A great book.
Full of lots of new information and powerful insights. Worth reading for the chapter on the Dark Web alone, which introduces the reader to the subject of Tor, encryption, and virtual currencies.
Not given over to unthinking liberalism on drugs either - the author makes it clear that 'research chemicals' can be really, really dangerous, and the fact that it is almost impossible to control the supply does not automatically prove that legalization is the only option.
Can't help thinking (a) that it's mad to have driven our kids from herbal substances on which it is hard to overdose towards synthetic ones the effects and correct dosage of which are poorly understood and (b) that part of the solution must surely be for the pharmaceutical industry to pull its finger out and develop a proper recreational drug program.