Piper, H. Beam: Paratime Omnibus. v2, 26 Sep 2008
An omnibus edition of the "Paratime" stories of H. Beam Piper which are in the public domain. These stories concern the Paratime Police, a law enforcement organisation from a parallel world which has learned how to move between timelines. They jealously guard the secret, even as they mine other worlds for their resources.
The stories in this omnibus are:
1. Genesis (some do not consider this to be a part of the series).
2. Police Operation.
3. Last Enemy.
4. Temple Trouble.
5. Time Crime.
Lots of illustrations, hence the large file size.