| Answer | Crossword Clue |
|---|---|
| ISPY | Popular children's "find it" book series |
| ISPY | Popular children's book series with hidden objects |
| WHERESWALDO | Popular children's book series ... whose protagonist is "hiding" in the circled letters |
| GOOSEBUMPS | Popular children's paperback series |
| BABAR | "Histoire de ...," first in a popular series of children's books |
| WHERESWALDO | Popular seek-and-find series |
