My guess would be that it isn't a knock-off but a superfluous supplement, the "if David Allen wasn't clear enough here's our translation" edition of GTD. I haven't read, seen, or otherwise encountered this book other than Brad's link, so TIWAGOS.

I saw it at Borders on my lunch break yesterday. It's like an over-verbose version of the book with a lot of extra stuff thrown in. They must've thought DA's version wasn't clear enough. (For me the only difficult thing was the big-picture stuff, which isn't really addressed in the book.)

I suppose the clear, concise style of Allen's book isn't enough for the people who think more is more.

(Which sort of makes sense given some of the client e-mails I've seen that use whole paragraphs to describe something I could've described in one sentence.)

I'm waiting for Larry the Cable Guy's "Gittin' er Done." I hear it comes with a killer software plugin for Outlook.