A captivating picture of the course of a young friendship. Maude and Sally trade sandwiches at lunch, whisper in class, and sleep over, one with the other, on Saturday nights. ""'If you were a little taller and I was a little shorter' [or, elsewhere, 'if your hair was a little shorter and mine was a little longer'], Maude would say, 'we could be twins.'"" ""On Halloween they went trick-or-treating as a pair of tomatoes."" Much of the fun is in seeing the tomatoes, and in the witty talking pictures throughout: when the text reads ""They took turns playing chopsticks on the piano,"" the picture shows Maude's mother calling from the doorway, ""How about a new tune, gifts?"" For ""Some afternoons they made phoney phone calls in a foreign accent to Simon who lived across the street from Maude,"" there are simultaneous pictures of the little gifts giggling, phone in hand, and of Simon in a Florida T-shirt holding the receiver from which issues ""Allo? Eez dees Simon?"" and then ""You are a beeeg nerd."" Then the pair is separated when Sally goes off to camp for six weeks. She writes of canoeing, of the terrible food, and then of the girl who shares her bunk ("". . . and she even has the same sneakers I do""). ""Then she hardly wrote at all."" By the time Sally returns, though, Maude has become friendly with Emmylou, who hasn't Sally's talents but has others of her own. Maude and Sally renew their friendship, but now they are often a threesome. ""And on Halloween Maude and Sally and Emmylou went dressed up as bumblebees. 'If your wings were a little bigger,' Maude says to Emmylou, 'and your antennae were a little longer,' she said to Sally, 'we could be triplets.'"" Such triangles don't always end up so harmoniously, but Weiss' views of the little girls have such appeal, observant humor, and recognition value that their accommodation seems only natural.