Jim C. Hines 
Codex Born [EPUB ebook] 

They’re back. And they want revenge…Sent to investigate the brutal slaughter of a wendigo in the north Michigan town of Tamarack, Isaac Vainio and his companions find they have wandered into something far more dangerous than a simple killing. A long established werewolf territory, Tamarack is rife with ancient enemies of Libriomancy who quest for revenge. Isaac has the help of Lena Greenwood, his dryad bodyguard born from the pages of a pulp fantasy novel, but he is not the only one in need of her unique and formidable powers…