Corrected entry: The evil priestess steals the "Book of Shadows". After the sisters find her and vanquish her, they return home. The next scene shows them walking up to the attic (having just arrived home), but none of the sisters have the "Book of Shadows" with them.
Corrected entry: At the beginning of this episode Cole appears in Phoebe's favourite film and says that it is a little trick he learned from the demon of illusion. However, Cole wasn't around in Chick Flick (where the demon of illusion appeared), he didn't come into the show until season 3.
Correction: Cole and the Demon of Illusion have both existed for centuries. Cole could have picked up the "little trick" at any time in the past, perhaps long before the episode "Chick Flick" took place.
Correction: Prue carries the book back into the attic. The first shot has them all entering, then it cuts to Prue up close. Before the shot switches to just Prue, we see Prue put the book on the table to her right. It's very quick, but it's there.