Monster Party is such a fun book! It would go perfectly with a kindergarten lesson on rhyming words. I would read this after the students had already been introduced and had a little experience with rhyming words. There are a lot of activities that could go along with this book, too. Students could create their own rhyming monster and decorate it with words that rhyme. You could also use this as a writing prompt and have the students write a story about monsters and have them include rhyming words,