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There's a real youth movement afoot this week as young-adult titles hold the top four spots on USA TODAY's Best-Selling Books list. All of them have benefited from movie adaptations.

At No. 1 for the second straight week is If I Stay, the 2009 novel by Gayle Forman about a teenage girl in a coma after a car crash. The movie version starring Chloe Grace Moretz opens Aug. 22. Forman's sequel, Where She Went, is No. 14.

At No. 2 is The Fault in Our Stars, the teen cancer tearjerker by John Green, which earlier this summer was No. 1 for 11 consecutive weeks. The movie starring Shailene Woodley opened on June 6.

At No. 3 is Lois Lowry's The Giver, its highest ranking on the list ever (the previous high was No. 7). The adaptation of the 1993 dystopian novel arrives in theaters on Friday and stars Jeff Bridges and Brenton Thwaites.

At No. 4 is Four by Veronica Roth, a new Divergent story collection. Roth's dystopian Divergent – the first in a trilogy – was adapted for film and filled theaters back in March. Divergent itself is No. 6 this week.

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