I downloaded from Amazon Bill Seitz's Hack Your Life with a Private Wiki Notebook: Mash Up "Getting Things Done" and Other Systems (Simplest Thing) [Kindle Edition]. It cost me $2.99.
I don't know what I expected, but this post by Phil Jones influenced me.
It was a mistake. To call this alphabetized collection of links and wiki pages a "book" is more than just an exaggeration. It comes close to fraudulence. Furthermore, the contents are rather dated, not to say very old and completely out of date.
My recommendation: Don't buy it! Visit his Website, if you must. The book adds nothing to the jumble you find there.
1. "Jumble" should not be taken as derogatory here. It may be inevitable in a Web site like his. It is, however, unacceptable in a book—at least most of the time. An artist like Arno Schmidt puts it to good use. But not everyone is an Arno Schmidt.