The Wherewood — Gabrielle Prendergast

Fourteen-year-old Blue (a human) should be upset that his new friends Salix (a Nixie) and Finola (a Faerie) have tricked him into going on another adventure into the Faerieland.

But he's actually quite excited. Especially since their quest to find the way back to Salix's homeland takes them through the Wherewood, a magical region where lost things go. They encounter confused pets, misplaced homework assignments and mountains of odd socks. But when a misstep leads Blue into the forsaken Witherwood, he comes face to face with an old enemy. And Olea, the cursed former queen of Nearwood, will not let Blue go so easily this time.

This is the second book in the Faerie Woods series, following The Crosswood.