Clark Roberts 
Halloween Night On Monster Island [EPUB ebook] 

What’s not love when a quartet of cousins visit their wacky uncle’s private island, complete with horror-themed amusement park, on Halloween?
The attraction is closed to the public for the night, too, so they have it all to themselves! No crowds! No lines! No waiting! A personal tour guide to take them around from attraction to attraction!
But then, one by one, they start feeling not-so-well. Strange things seem to be happening. Is that a real werewolf lurking around in the shadows? Miss Penny’s only wearing a witch outfit, isn’t she?