Cartoon-like illustrations accompany photographs and magnified images of dust mites, bed bugs, clothes moths, germs, bacteria, and mold that can be found in a bedroom.  Each living thing is described along with its living conditions.  There is a box on most pages with additional information.  This colorful book is well designed with a good balance of photographs, illustrations, and text.  A glossary, index, related books to read, and two informational websites are included.  Readers will enjoy the “gross” factor.