The Lorax has genre Children's literature
[Human]: Could you recommend some books that are similar to The Lorax? [Assistant]: Are you a fan of children's literature? [Human]: Yes, I'm. What are some popular kid titles? [Assistant]: Sure, if you like children's literature, you might enjoy The Giver or Ramona and Her Father. Are you a fiction fan? [Human]: I'm a little bit of a fiction fan. Who wrote The Giver? That book sounds interesting. 
The Giver was written by J.K. Rowling and is considered to be science fiction. Are you familiar with that author?