I read this book to my 5 year old. The marvelous illustrations are a great addition to the text. The illustrator, Adam McCauley, had a lot of fun with the layout, arranging the two main characters, a sister and brother, in a multitude of settings and angles, practically turning them into a sort of motif. His muted colors suit the mood. The text is a sort of poem with rhyme, repetition, and onomatopeia, something I am almost always happy to encounter in the text of a picture book. The story cleverly cycles through a number of scary creatures, such as ghosts, werewolves, skeletons, and witches. I welcomed the variety. My daughter immediately caught on to, and enjoyed, the repetition. I am sure she'll enjoy hearing the book again!