An extremely well-written book, that manages to teach you something new (OSMM), as well as educate you in OSS and give a well-written and researched response to Carr's opinions as given in HBR.

What also make it stand out is that it is both well-researched and practical (and to top it of, very well-written). The only thing missing is a thorough review of the different OSS licenses and their implications.

Anyone that has to work in IT (both at a Management or a more hands-on level) has to consider this mandatory reading. In short, excellent reading.