The Faeries' Promise Series by Kathleen Duey

Alida is a faerie princess, imprisoned for years in the castle of Lord Dunraven to protect an ancient law prohibiting contact between humans and faeries. So when a human boy, Gavin, helps Alida escape to search for her long-lost family, their flight is filled with danger. Can they avoid Lord Dunraven's guards? How can they keep Alida's identity a secret?

Faerie princess Alida and Gavin, the human boy who helped her escape from Lord Dunraven’s castle, are desperate to find Alida’s family, now living in a hidden place where the banished faerie community has resettled. Alida and Gavin’s friendship grows stronger as they face cold and rain and the constant threat of Lord Dunraven’s guards. But now that Alida’s escape has put the fragile peace between Lord Dunraven and the faeries in jeopardy, will her family welcome her back?

Alida has escaped Lord Dunraven’s castle and defied his law to find her exiled faerie family. Using new magic to protect themselves, Alida and her family make the dangerous journey home, back to their beloved meadow near the human village of Ash Grove. When Dunraven’s greed threatens the villagers with starvation, Alida wants to help them. But if Lord Dunraven’s guards find out that fairies are helping humans, her family will be in terrible danger.

In simultaneous hardcover and paperback editions, the final book in a four-book chapter book series, a companion to The Unicorn's Secret. The faeries have returned to their beloved meadow near the village of Ash Grove. Winter is coming and they are working hard to prepare for the storms—and to stay hidden. Alida saved the villagers' crops from Lord Dunraven's greed, but now the people of Ash Grove know that the faeries have returned... moreIn simultaneous hardcover and paperback editions, the final book in a four-book chapter book series, a companion to The Unicorn's Secret. The faeries have returned to their beloved meadow near the village of Ash Grove. Winter is coming and they are working hard to prepare for the storms—and to stay hidden. Alida saved the villagers' crops from Lord Dunraven's greed, but now the people of Ash Grove know that the faeries have returned. Will they tell Lord Dunraven’s guards? The faeries live in fear of being discovered and Alida wants desperately to find a way to make her family safer. Then a frightening accident in the woods outside Ash Grove brings even more danger, and an opportunity for Alida to forge a friendship that could change the faeries' lives forever. The risk is terrible—Alida can only follow her heart. less