Box sets of the first five books of George R. R. Martin's "A Song of Ice and Fire" series are available on Amazon.com and BarnesandNoble.com. As of June 2015, only five books have been released.
George R. R. Martin is currently working on the sixth book of the series, titled "The Winds of Winter." No release date has been set, but Martin has said he hopes the book will be released before the sixth season of HBO's "Game of Thrones" TV series, which is based on his work. The seventh book of the series, titled "A Dream of Spring," has no publication date.