This is Dinosaur Shaman and Time In Overdrive,
a lot of 2 TPB (trade paperbacks) by Mark Schultz
and published by Kitchen Sink Press in 1990.
Time In Overdrive is in Near Mint condition and 
Dinosaur Shaman is in Very Fine condition because
the front cover has a crease at each corner.
 Please inspect photos before bidding. 
U.S. sales only and shipping is via media mail. 
Thanks for looking and have a nice day.