One of the readers/writers forums I belong to, and by far the most writer-friendly one, is Bestseller Bound. The site is currently celebrating its first birthday with a give away of books by members - including me! There's about fifteen books up for grabs, of all styles and genres.
To see the full list, and to enter the competition, see one of the participating author blogs below:
Quiet Fury Books
Maria Savva's Blog