These book names are by somebody but I can't say with certainty who it was because it was over 2 years ago now :(

541) Grease

542) Rose

543) (Addicted To) A Memory

544) Scorpion

545) (Heart of) Gold

546) His Bullet

547) (K stands for) Karma

548) Lost

549) Gone

550) Lesson(s) never learned

551) (Steps/ flying/ counting down etc to) Eternity

552) The Safe Side

553) Park Benches

554) Raindrops

555) Who you/we Aren't

556) Sunburn

557) Breakdown

558) Burning memories

559) Hey America

560) Losing (you/me/us)