Echo One, a collection of short stories from the _Secret World Chronicles_ is up for $1.99 again on Amazon for the Kindle.
A guilty pleasure of mine, this set of books is a shared world feature Mercedes Lackey which was originally a podcast (a number of these shorts are from that), which was a re-telling of a "City of Heroes" campaign back before that video game featuring superheroes, Nazis, and other things from various fictional settings shut down.
https://www.amazon.com/dp/B0B5GCKTBH