3.5? Somewhere around there. This was a good book. Definitely. But it was much slower than I thought it would be, and sometimes I will admit I was a little bored. I went into this book thinking that it was about 1 long race that lasted a week or something. But it's about multiple short races. Like regular horse races, except the horses are robotic, and the races have traps and stuff in them. The races didn't start until about halfway through the book, and even when after they started, there was less interesting stuff in between them.
But I LOVED the races. The races were SO MUCH FUN and they were SO EXCITING and the last 100 pages or so of the book was fantastic. There were definitely parts before that that I enjoyed at well, don't get me wrong, but the last 100 pages were super easy to just plow through because it was so intense.
Also I cried twice.