They must finish at all cost

Megan has to know how things end; a book, a story, or even a stupid TV series. She will push to the end.

With Gideon and Hudson, the apple didn't fall far from the tree. They both devour a book (or a series) once they've started one. Gideon is especially veracious about audiobooks. When he gets a new audiobook, he essentially dissappears for a few days. I'll stumble across him in some random location patiently listening to his book.