A to Z Mysteries/Differences Books and TV Series

Any ideas about the differences of A to Z Mysteries.

The Absent Author
(Any ideas)
 * The kids are off the book store (?)

The Bald Bandit
(Any ideas)
 * The kids went to the (?)
 * Lucky O'Leary told the kids that he had a bad time when he (?)

The Canary Caper
(Any ideas)

The Deadly Dungeon
(Any ideas)

The Empty Envelope
(Any ideas)
 * The kids are playing volleyball, (?)
 * The kids spy Doris and Brad, (?)