Hammer & Blood: A Legacy of Devils novel

Ptolemy Lindquist is one of the greatest assassins in the world and is contemplating retirement. Calista, his daughter, wants to celebrate her college graduation with her boyfriend and friends at a popular lake. Thanks to Ptolemy's last assignment and Calista investigating why her boyfriend has been acting sketchy, father and daughter find themselves trapped in a house of horrors by Zebadiah Seeley, a convicted kidnapper and rapist looking to continue his evil ways while wearing the head of a bear.