A quite compelling case, and it got me very excited about the prospect of manned missions to Mars. Probably would have been better to read the updated version from 2012, but I only heard of it after finishing. Good to see that SpaceX is using this as a playbook of sorts (whether or not they'd admit it). The book itself err'd on the technical side, but seeing as I'm an engineer, that was alright. Definitely not for the faint of heart in that regard though.