An excellent read,
This review is from: Entering Space: Creating a Spacefaring Civilisation: Creating a Spacefaring Civilization (Paperback)
An excellent review of the options for future human spaceflight, displaying a rare combination of technical engineering know-how & business sense as regards what would make an economically sustainable space programme. Readers need to bear in mind when reading the early chapters on options for low/near Earth orbit that Zubrin has a clear "angle" that favours a manned Mars mission as the next "big step" (see "The Case for Mars" by the same author), although to be fair, he makes this quite clear in the present text.
The one downside is that this book is now rather old, so the early chapters on immediate opportunities may feel a little dated (although it is arguably an even greater indictment of national governments that no grand strategy has been proposed in the interim) but the bulk of the book is taken up with longer-term plans for the solar system & beyond, so it is still well worth the purchase price.