A.E. Stanfill 
Butcher In The Cabin [EPUB ebook] 

There are some that go to summer camp for a few months of fun. To hang out with friends and possibly make new ones.
For others, summer camp can be pure hell. Just ask Sam and his friends. Bullied all summer, hated by the counselors. But that’s not all they have to worry about.
There is something in the woods that is stalking anyone who enters. Seeking revenge, blood and death.
And it will not be satisfied until everyone in the camp will be a trophy on its wall.
This book contains graphic violence and is not suitable for readers under the age of 18.