To register your copy of Patriots of Mars, simply enter your email address into the comments box below. (It will not appear on the site!) Registration entitles you to a free Kindle version of the next installment in the series. (If you want a version other than Kindle, note that in the comments as well.)
Your email address won't be sold or used maliciously, although I may noodge you to head over to Amazon and write a short reader review.
I reserve the right to end this giveaway at any time. But not today.