20 books you should read before they become movies this year

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Theo James and Shailene Woodley reprise their roles in "Insurgent."

"Insurgent," the second movie in the popular "Divergent" series starring Shailene Woodley, debuts in theaters this weekend.

It's one of many highly-anticipated book-to-film adaptations lined up for 2015.

We compiled a list of some of the best books becoming movies this year. This year brings back "Gone Girl's" Gillian Flynn with a new psychological thriller and the culmination of the "Hunger Games" series.

From sci-fi to period pieces, and even some true stories, here are the books you need to read before they become movies this year.