Nightingale - The Dreamer Chronicles, #4

It's been six months since Julie saw Tommy last. It's been five months since he's called and talked to Julie, Carrie, or Ben. No one is happy about it, least of all Julie. He finally returns during the summer break at Grey Haven, and Julie doesn't know what to think about his return, other than it coincides with a shade attack and he seems involved. Tommy is changed, different from the boy she remembers, and carrying secrets that see him attacked and put into a coma.
Desperate to get him back, and to unravel the secrets between them, Julie searches for answers about the attack with old friends and new. Revenge has never been more personal, and Julie knows she will do whatever it takes to save him. Even if it costs her everything. Nightingale is the fourth book of The Dreamer Chronicles.