R.L. Stine 
Party Summer [EPUB ebook] 

Cari Taylor and her three friends are looking forward to a party summer, working at The Howling Wolf Inn, an old hotel on a tiny island off Cape Cod. But to their dismay, the hotel is completely deserted, and someone warns them to leave immediately. But the mysterious owner, Simon Fear III, allows Cari and her friends to stay, giving them the run of the hotel. The four teenagers are thrilled…until Simon Fear is murdered. Cari and her horrified friends want outbut they cant escape! Theyre trapped on the island. And thats when the party begins…