What most forget is that book reviewers are doing this for free. They decided to take a passion and help authors at the same time. But they still have their day jobs to focus on and families to take care of. Your book is not the top priority in their life.
On top of all that, too many books are submitted to me without any editing. I have had way too many where I couldn't get past the first few chapters. Please take more pride in your work and get it edited and proofread.
So that being said, I'm technically no longer accepting books to review. If you still want to put your book in my queue knowing it might be a year out before I get to it, please send them to firstname.lastname@example.org. I will not promise when I'll get to it, but someone I'll read it.