There's a Wocket in my Pocket is my all time favorite Dr. Seuss book. It may not be the most popular (that may be because it can get a little creepy) but it was always the one I reached for as a child. This book would be awesome to use when studying rhyming words. I would use this book for older grades such as 2nd or 3rd because of the spook factor. The guided reading level is H and the Lexile level is 320L.