I've been relying heavily on online reviews lately, particularly Goodreads reviews. I did start reading a book reviewed on a blog recently, but found I really didn't care for the book.
I don't know if this helps or not, but I use the cover, title, size of print, and the first paragraph to help me decide if a book is right for me or not. Recommendations also help. I've read and enjoyed books I would not have picked up because they were assigned in book clubs or recommended by people I trust. Lynnwww.writeradvice.comAuthor of You Want Me to Do WHAT? Journaling for Caregivers