Peter Watts, a Canadian Marine Biologist responsible for Vampire Domesticantion lectures (Which you should spend 40 minutes and listen to, and definitely read the little corporate slogans at the corner of each slide) licensed a bunch of his books under CC license, and made them available for download.
Thank you, Peter! I was looking on Amazon, and at 50 to 90 dollars a copy (per softcover), it was not feasible for me to buy them.
If you liked these, consider buying Behemoth: A-Max and Behemoth: Seppuku. They are also good.
Oh, and regarding slogans: in F.E.A.R, on certain levels there were posters that said “Remember, it’s Quantity, Quality, Safety in that order!”