I am quickly becoming a huge fan of the Pathfinder Tales novels; they are quick and fun reads, and I have yet to find one that was poorly written, plotted or paced. They are all based in the Pathfinder world of Golarion, but even if you don’t play Pathfinder, the online references that paizo puts up on the Pathfinder Wiki are enough to get you oriented.
City of the Fallen Sky really tweaked one of my happy reader nerves with the introduction of the main character, Alaeron, who is an alchemist and a really nerdy scientist. Right up my alley. The tale is paced well, and there is plenty of action and motive for everyone involved, but the constant “scientist’s eye view” of everything they ran into was a delight. He is wonderfully distracted by the questions of how or why, and often needs to be reminded that their lives are in danger. He is also wonderfully good at rationalizing his own behavior, and is delightfully naive about certain things… like women.
Tim Pratt is a Hugo Award winner, so no surprise that he can turn out a good story. It was, however, a delightful surprise that he is writing gaming-related fantasy. Kudos to the Paizo team for bringing him aboard.
One more note: I purchased this book in PDF digital format. More Kudos to Paizo for putting their products out in this medium. Well done!