Yes, those are pictured in reverse order of release since today is the official release date for Wendy Delsol's Flock (Stork Trilogy), the final book in the trilogy. The books draw heavily from Andersen's The Snow Queen as well as other folklore, especially Norse mythology and Icelandic folklore. The third book was originally titled "Tide," but was renamed to flock after some cover changes.
After surviving her (shall we say) intense adventure in Iceland, Katla is psyched to be back for a blissfully uneventful senior year of homecoming and fashion explorations. But her hopes of dodging unfinished business are dashed by the arrival of two Icelandic exchange students: Marik, an oddly alluring merman-in-disguise, and Jinky, a tough gypsy girl. It seems Katla not only enraged the Snow Queen by rescuing her boyfriend, Jack, she also was tricked into promising her frail baby sister to the water queen — and Marik has come to collect. What’s worse, Katla doesn’t dare confide in anyone lest she endanger them, so even her soul mate, Jack, is growing suspicious. And now Katla’s stork dreams, her guide for matching babies with mothers, have become strange and menacing as well. Hold on for a thrilling finale as the heroine of Stork and Frost calls on her wits (and her wit) to protect those she loves and face a final mythic disaster.