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, (?)
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