Threshold by Ryk E. Spoor, Eric Flint

309 pages first pub 2010 (editions)

fiction science fiction adventurous fast-paced

Description

When the strange fossil she'd discovered had ended up giving her a trip to Mars, Helen Sutter thought she'd gone about as far as any paleontologist would ever go in her lifetime. But when you've also married A.J. Baker, overconfident super- sensor...

Read more

Community Reviews Summary of 27 ratings

Average rating

3.67

Content Warnings

This book doesn't have any content warnings yet!

If you're the author of this book and want to add author-approved content warnings, please email us at [email protected] to request the content warning form.