While learning to count, all children will skip numbers. This is the second book in a series where a number is skipped while counting. Four Went on Vacation is the first book in this series. 8 has one especially exhausting day. By the time he falls asleep, 8 is so tired that he sleeps for 4 days. The narration of the book is about the adventures his friends, 5, 6, 7, and 9, have while 8 is sleeping. 5, 6, 7, and 9 go to the park, have a picnic at the lake, go fishing, go to the movies, have pizza, go the beach, and the Kids Rock concert. 8 is not happy when he finally wakes up. The book's narration is written in a manner that entertains both the child and the adult reading the story, combining both learning and childhood imagination.