A little trick about using Goodreads to obtain reviews of a book -- selecting the book will lead you to the Goodreads reviews, but to get to the reviews of a seller, then select the name of the seller. (I haven't tried that for all sellers, but I know it works quickly and easily for Amazon. As I recall, it may have taken another step or two for others I occasionally check.)
Avoid spoilers -- i.e., comments about the plot or characters that might "spoil" the read for those who still reading the book.