Blake Hoena 
Boy Under the Bed [PDF ebook] 

Even monsters get scared, and Will the ghost is beyond scared when he hears noises in his room after he goes to bed. A thump from under the bed and a thud from the closet lead Will to discover a human boy and girl in his bedroom! He needs to get them out before his scary sister finds them. Will calls his friends and the Monster Heroes come to the rescue! A glossary, discussion questions, and writing prompts complete this early chapter book.