Finally my absolutely favorite author, Kelley Armstrong, published the best short stories (semi-short actually, about 80 pages each) in her collection. The collection is called "Men of the otherworld" and it's mostly about the childhood of one of the best characters in the series, Clayton Denvers.
I've always loved her short stories which were offered for free on her website but after she took them down (publisher gave her an offer on them), I've been waiting to read them and the hardcover book does not disappoint. A marvel of a read, truly captivating; just grabs you and makes you turn page after page until it's 4am and you realize you have to wake up for work the next morning.
I highly recommend it. She writes so well that I have bought every single book she has written, has written a short story for and even the ones where she simply wrote a 2 page introduction to.
Another great author I've been enjoying is James Rollins (of course I own a copy of every book he wrote as well). Great action/adventure stories. I recommend jumping into the first
Sigma force novel.