Blindsight is my first novel-length foray into deep space—a domain in which I have, shall we say, limited formal education. In that sense this book isn't far removed from my earlier novels: but whereas I may have not known much about deep sea ecology either, most of you knew even less, and a doctorate in marine biology at least let me fake it through the rifters trilogy. Blindsight, however, charts its course through a whole different kind of zero gee; this made a trustworthy guide that much more important. So first let me thank Prof. Jaymie Matthews of the University of British Columbia: astronomer, partygoer, and vital serial sieve for all the ideas I threw at him. Let me also thank Donald Simmons, aerospace engineer and gratifyingly-cheap dinner date, who reviewed my specs for Theseus (especially of the drive and the Drum), and gave me tips on radiation and the shielding therefrom. Both parties patiently filtered out my more egregious boners. (Which is not to say that none remain in this book, only that those which do result from my negligence, not theirs. Or maybe just because the story called for them.)