The Girl of Fire and Thorns series by Rae Carson. Don't let this pic fool you, it's a trilogy, the three on the bottom are just novella's. I am in LOVE with this series!!!! One of the best fantasy series I have read in a long time, absolutely amazing!!!!
The Thirteenth Gate (Dominion Mysteries Book 2) by Kat Ross https://www.amazon.com/dp/B071RQ142S/ref=cm_sw_r_pi_dp_x_CcDAzbXWTKRC1