Amazon.com has a large selection of free e-books for the Kindle. But I don't have a kindle, you say? No worries, when you purchase the e-book they will prompt you to add a device. Choose kindle for pc and then download the free kindle software onto your computer. You will only have to do this the first time you download a book. After that it should automatically know where to send the book. They also have a nice ap for iphones if you are in the iphone crowd.
To find free kindle books go to the Kindle Store on Amazon.com and search for 0.00 This will pull up Kindle books that have a price of $0.00. There is a pretty good selection of older out of copywrite works like:
The Adventures of Sherlock Holmes
Pride and Prejudice
And also some newer releases like:
My Soul To Lose
Crime Scene at Caldwell Ranch