Paul Shipton 
Bats! (Oxford Read and Imagine Level 4) [PDF ebook] 

Ben, Rosie, Grandpa, and Clunk are camping with their friends, Max and Alice. Clunk has gone to the van, but where have Ben and Rosie gone? Can Nicole the park ranger help Grandpa find them? And what is moving quickly in the dark? Read and Imagine provides great stories to read and enjoy, with language support, activities, and projects. Follow Rosie, Ben, and Grandpa on their exciting adventures . . .