R. L. Stine 
Just Beyond: Monstrosity OGN [PDF ebook] 

Ruthie and Ezra Dillon’s dad and uncle just bought an old Hollywood movie studio, known for all the best horror flicks of the 50s!The family plans to revive the old place and start making scary movies for the modern era, which Ruthie and Ezra are eager to star in. What they don’t realize, though, is that the old classic monsters like Wolfenscreem, the Lagoonatics, and the Wasp-Keeper are all a little bit TOO realand they’re coming back with a vengeance!