Like many bloggers who have been online for a good bit (this blog is ten years old, oh my!), I get invited to read a lot of books. Sometimes writers send me books without even asking if I want the book!
It's hard to review books from 'new' writers, because they put their heart and soul into the book and...if it's not my cup of tea, I hate writing about it. I don't want to do a bad review, that's not me. As a writer, constructive criticism is worthwhile, just not in a blog post or Facebook note.
Therefore, I seldom review books I am not happy with. If I received your book, and I did not write about it within six months, it's likely I was not happy with it.
Luckily, the GOOD books outweigh the not so good books. (In the last ten years of reviewing books I have only received ONE really bad book...really BAD...so, I call the books that aren't up to snuff, not so good. It's fair. They are not so good... and perhaps, if the writers took creative writing classes, they could end up being good.)