99% of people will LEARN, SOMETHING, from EACH, of these BOOKS. Is that not what books are four? Since I am trying to sell the most copies and teach as much as I can, one can buy all four of my books for under $5.55. If you make ANY purchase, you will get my personal bookmarks file as well, which contains hundreds of online sites I have randomly bookmarked over the past couple of years. All book files are .pdf format.  If you don't have a .pdf viewer, you can search for one online or go here: get.adobe.com/reader/otherversions If you follow me by entering your e-mail, I will attempt to send you any updates I make to the books for which you purchased, free of charge. Also, I have a personal website you can check out: ryanpapke.com Please feel free to subscribe with me here on Gumroad as well. Thanks!