I am a regular reader of about half of these authors, and was pretty excited to read stories that combine some of my favorite characters. Unfortunately, this may be one of those things that sounds great in theory only. I really liked the story featuring Lucas Davenport and Lincoln Rhyme. They were a natural fit for one another, and Sandford and Deaver did a nice job fleshing out the plot.
However, most of these stories felt a little bit forced. I think a lot of that can be attributed to it being difficult for the authors to fashion a cohesive story featuring two major characters in only 30ish pages, but a couple of these were just out and out disappointments to me. Particularly the final story that combined a couple of my favorites in Jack Reacher and Nick Heller.
I didn't dislike this book by any means. That being said, half of these authors/characters were new to me, and there was nothing in this introduction that makes me want to explore them further.