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Little Kids First Big Book of Why (2011)
Published
The best first reference book for the age when every sentence starts with why. Amy Shields starts from a child's own world, with questions like why do I have a belly button and what makes a plane fly, and answers each one in a short burst of text beside a big, clear photograph. Hands-on activities, simple recipes and crafts turn some answers into something to do that afternoon. It is aimed at preschool to second grade, so it works as a read-together book at four and a read-alone one by seven.
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Little Kids First Big Book of Dinosaurs (2017)
Published
For the four-year-old who already knows more dinosaur names than you do. Catherine D. Hughes covers 52 species, grouped by size from small to gigantic, which suits the way young children actually sort dinosaurs. Each spread gives a phonetic pronunciation, so the adult reading aloud stops guessing, and a chart comparing the animal's size with a person. A map of fossil finds and a glossary round it out. Franco Tempesta's illustrations are large and vivid without being gory, and the text is short enough for a new reader to tackle alone.
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Usborne Children's Encyclopedia (2026)
Published
The Usborne Children's Encyclopedia, current 320-page edition with QR links
The gentlest of the big general encyclopedias, written for children from about six. Its 320 pages are grouped into themes a young reader can find their way around: Our World, Animals and Plants, How Your Body Works, History, How People Live, Science, How Things Work, Space and Maps of the World. Almost every page carries links and QR codes to videos and websites chosen by Usborne, which keeps the book itself short and readable while giving older siblings somewhere to go next.
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DK Children's Encyclopedia (2022)
Published
DK Children's Encyclopedia, revised 2022 edition
DK's answer for ages seven to nine, and the easiest encyclopedia here for a child to use alone. Each of its more than 250 topics gets a single page, with a short explanation and plenty of pictures, so a child can look something up and finish the entry before losing interest. That one-page rule is also its limit: answers stay brief, and a curious ten-year-old will want the Knowledge Encyclopedia next. The 2022 revision added 16 new pages and updated existing ones, so pass over the 2017 first edition if you see both.
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Maps (2013)
10.0/10on Open Library
Published
An atlas built for lying on the floor with. Aleksandra and Daniel Mizielinski give each featured country its own oversized spread and fill it with tiny labeled drawings of local wildlife, food, activities and famous people, so a child learns where a place is by what happens there. It is a picture atlas rather than a political one, with fewer than 50 countries and nothing to memorize for a test, and it dates from 2013, so treat it as an invitation to the world rather than a fact checker. Ages seven to ten get the most from it, but whole families end up poring over the same page.
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Animalium (2014)
Published
The animal reference that looks like a natural history museum on paper, which is exactly its idea. Katie Scott's detailed, old-fashioned specimen drawings are arranged in galleries through the animal kingdom, with Jenny Broom's notes beside them. It is the book here for the child who loves drawing as much as facts, and the large format makes it a shared browse for parent and child. The text suits about nine and up, though younger children happily use it as a picture book. It began the Welcome to the Museum series in 2014, so a child who loves it has more volumes to move on to.
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Kingfisher Space Encyclopedia (2025)
Published
The Kingfisher Space Encyclopedia, 2025 edition
Space books go stale faster than almost any other kind of reference, and this one is recent enough to include the launch of the James Webb Space Telescope, the reusable Falcon 9 rocket and NASA's advanced spacesuit design. Mike Goldsmith, who holds a PhD in astrophysics, arranges its 160 pages by theme rather than A to Z, so a child can follow one big question through several spreads. A glossary, an index and a list of websites make it useful for homework as well as browsing. It is pitched at ages seven to eleven, the years when planet questions peak.
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Britannica All New Kids' Encyclopedia (2020)
Published
Britannica All New Kids' Encyclopedia, updated 2025 edition
The encyclopedia that admits what nobody knows yet, and that is its best feature. Edited by Christopher Lloyd with Britannica, it draws on more than 100 experts and over 1,000 images across 424 pages for ages eight to twelve. Its Known Unknowns sections point to the open questions in science and history, which tells a child that knowledge is still being made. A multiple-choice quiz ends each chapter, with the answers inside that chapter, so it rewards actually reading. The September 2025 update refreshes timelines and facts but is largely the 2020 book, so an older copy is no disaster.
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Knowledge Encyclopedia (2023)
Published
DK Knowledge Encyclopedia, 2023 third edition
The one to buy if you buy only one for a child of nine to twelve. Its 360 pages run from the inside of an atom to black holes, taking in chemistry, animals, the human body, robotics and history, and the detailed 3D computer images do much of the explaining: a cutaway shows what a paragraph would struggle to describe. Pages are dense, so it suits a confident reader more than a beginner. The October 2023 third edition was fully updated for recent developments in science, technology, space and geography, so make sure you get it rather than an earlier one.
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Knowledge Encyclopedia Planet Earth! (2022)
10.0/10on Open Library
Published
Knowledge Encyclopedia Planet Earth!, 2022 edition
The pick for the child who wants to know what is happening under their feet. A companion to DK's Knowledge Encyclopedia, its 208 pages for ages nine to twelve use computer-generated cross-sections and cutaways to show what goes on inside a volcano, a hurricane or a flood. Beyond the natural disasters children ask about first, it covers the planet's long history, its habitats, climate change and the human footprint, so the follow-up questions have somewhere to go too. It is the Earth-science volume to pair with a space book, for the child whose curiosity points down rather than up.
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Human Body a Visual Encyclopedia (2024)
Published
Human Body: A Visual Encyclopedia, 2024 edition
The answer to the body questions that tend to arrive at bedtime. DK refreshed this 256-page guide in December 2024 with a new design and the latest facts and figures, and it works from the outside in: skin, muscles, bones and organs, then down to cells and DNA. Photographs, diagrams and computer-generated artwork make the insides visible, and quizzes let a child test what stuck. It is pitched at nine to twelve, a real step up from the few human body pages in a general encyclopedia.
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The Usborne science encyclopedia (2009)
Published
The Usborne Science Encyclopedia, 2024 edition
The science reference a child can grow into rather than out of. Its 448 pages cover physics, chemistry, biology, earth science, astronomy, anatomy and computing, at a level that starts around age eight and keeps working well into the teens. More than 1,000 recommended websites and over 180 QR-linked video clips extend the topics, so a question about magnets or the water cycle can end with an experiment to watch. It is the book here for the child who has moved past wanting pictures of planets to wanting to know why they orbit.
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Dinosaurs: A Visual Encyclopedia, 2nd Edition (2018)
Published
Where a dinosaur-mad child goes after the Little Kids book. Made with the Smithsonian Institution, its 304 pages profile more than 100 prehistoric species, with new digital images for this edition that show feathered dinosaurs as the research then understood them, and each profile gives the facts a nine-to-twelve-year-old likes to quote. The reconstructions follow the research at the time of the 2018 second edition, so a few dinosaurs may look different in newer books as finds keep changing the picture. Of the dinosaur references here, it is the one with the depth to last a child through several years of obsession.
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National Geographic Kids Almanac (2009)
10.0/10on Open Library
Published
National Geographic Kids Almanac 2027, published May 2026
The reference that renews itself every year, with about 40 percent new content in each edition, which makes it the best answer here to the outdated-facts problem. The 2027 edition's 368 pages for ages eight to twelve mix animals, space, geography and science with interviews with National Geographic Explorers, recent James Webb Space Telescope images, a new chapter on art and creativity, and homework help scattered throughout. Games and jokes keep reluctant readers turning pages. Buy the current year rather than a bargain older copy, since the up-to-date facts are the point.
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Guinness World Records 2027 (2026)
Published
Not an encyclopedia, but the reference book children read cover to cover without being asked, and a fair way into facts for a reluctant reader. The 2027 edition, out in August 2026, spreads its 240 pages across eight chapters from nature and science to sport and human talent, and profiles eight young record holders under 16, which children tend to find more exciting than any adult feat. A neon-green cover and green-themed records give this year's edition its theme. Read it for wonder rather than study: records change, which is why a new edition arrives every year.
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