Please note that this is the paperback version of Drummond's older book "How to be an Artist" (this is admirably admitted to on the back cover, but harder to tell when you're browsing on Amazon). If you enjoyed "45" but found "17" a little bit wanting, I recommend "$20,000". It chronicles Drummond's further adventures in art - though Drummond's art has been hollowed out and replaced with an obsession with money. This is not a bad thing, as Drummond's money-fixation is all about evaluating its place in society, not glorifying it or simply treating it as an unquestionable necessity of life.
Drummond expands on his fascinating project "A Smell of Money Underground" first discussed in "45", gets sidetracked by something called Drummond's International Grey which is of interest seemingly only to himself, and then pulls it all together with reasonable advice on How to actually Be an Artist. He covers a moderately interesting project (UK'n) but skips over what I think are more intriguing collaborative projects (the Silent Protest walks, the band Perl Grey).
Note also that even if you have the older hardback version, this is updated (at least to 2006, oddly, given that this is being published in 2010). A third edition, documenting the actual burial of $20,000, is planned for the future, along with a TV documentary. Looking forward to it.