Frog and Toad Are Friends (1920)

Five short stories about two very different friends, first published in 1970 and each only a few pages long, so every sitting ends with something finished. Lobel wrote it in English as an early reader, with short sentences and plenty of dialogue, yet the humor is dry enough for adults: Toad's sulks and Frog's patient schemes feel like any long friendship. The dialogue-heavy pages are especially useful for learning how people really talk, from greetings and invitations to apologies. Spanish learners can find it as Sapo y Sepo son amigos. It earned a Caldecott Honor, and the soft pictures make the action easy to follow.