Infinity Train is a very good animated series. I would compare it's plot's abstract and creative direction to innovative series of the likes of Over The Garden Wall, ATLA, Code Name Kids Next Door, Adventure Time, Hilda, Regular Show and Steven Universe. It's a great series with an amazing diverse cast of characters who evolve in each book, with different goals and challenges along the way, on a train with an infinite number of cars, that are host to an infinite number of experiences.  The fourth book was stated as its final season given that HBO wants to drop the former Cartoon Network series. But the creator has stated he wanted to make 8 seasons if he could (8 = infinity symbol). Please help by signing this petition so HBO execs don't drop the show and encourage a 5th book. Thank you!