Originally Posted by HarryT
Baen also have "Time Traders II" which contains "The Defiant Agents" and "Key Out of Time".
I've started reading the Baen Books version of Time Traders, and discovered that it's been revised for this edition, as compared with the old out-of-copyright version available on feedbooks. Just minor things -- the bad guys are no longer the Soviets, but a resurgeant "Greater Russia", and there are rather less atomic-powered vehicles (probably a good thing!). Presumably this is to make them tie in better with the new volumes; it certainly makes them feel less dated. Volume 6, Echoes in Time, is available as an ebook, though not from Baen (I've spotted it on Fictionwise and Books On Board), but not volumes 5 and 7.