When it comes to books the length often is a deal breaker on whether to buy it.
Personally I prefer shorter books so that I can read it in a shorter period of time and have the chance to read another. I feel that when I read a longer one I tend to lose interest at some point.
If I were to read a longer book it would have to have shorter chapters or sections. I find this helps to motivate me to read as I can set myself goals.
Some people however much prefer to read longer books as there can be more depth or subplots. It may take more time to explore a character or storyline. You can also feel more invested in the book if you are reading it for longer.
It is a completely personal thing and you can discuss your opinion in the comments !
Many thanks Caitlin X
(PS please feel free to comment your opinion)