Books on my shelf along the line of XDM (that is, GM advice/tips) are:
Never Unprepared: The Complete Game Master's Guide to Session Prep
"Whether you’re new to game mastering or have been running the same campaign since 1974, Never Unprepared: The Complete Game Master’s Guide to Session Prep will help you prepare for games faster, avoid common pitfalls, and have more fun in the process."
<a href="http://www.enginepublishing.com/never-unprepared-the-complete-game-masters-guide-to-session-prep" rel="nofollow">http://www.enginepublishing.com/never-unprepared-the-complete-game-masters-guide-to-session-prep</a>
Masks: 1,000 Memorable NPCs For Any Roleplaying Game
"This book presents 1,000 “masks” — non-player characters that are fun to play, and that your players will never forget."
<a href="http://www.enginepublishing.com/masks-1000-memorable-npcs-for-any-roleplaying-game" rel="nofollow">http://www.enginepublishing.com/masks-1000-memorable-npcs-for-any-roleplaying-game</a>
Eureka: 501 Adventure Plots To Inspire Game Masters
"This book contains 501 complete adventure plots usable with almost any roleplaying game, plus GMing advice and tools for making the most of every plot."
<a href="http://www.enginepublishing.com/eureka-501-adventure-plots-to-inspire-game-masters" rel="nofollow">http://www.enginepublishing.com/eureka-501-adventure-plots-to-inspire-game-masters</a>
Play Unsafe: How Improvisation Can Change The Way You Roleplay
"This book explores what happens when you throw the serious stuff away: when you stop working, start playing and put stories at the heart of your game."
<a href="http://www.amazon.com/Play-Unsafe-Improvisation-Change-Roleplay/dp/1434824594" rel="nofollow">http://www.amazon.com/Play-Unsafe-Improvisation-Change-Roleplay/dp/1434824594</a>
John Wick's Play Dirty
"Learn the worst, most despicable, dastardly and downright dishonest game mastering tricks, traps and tactics that will make you the GM your players love to hate!"
<a href="http://johnwickpresents.com/market/products/playdirty.html" rel="nofollow">http://johnwickpresents.com/market/products/playdirty.html</a>
Hamlet's Hit Points (by Robin D. Laws)
"Presents a toolkit that helps make storytelling in any RPG easier and more fun by classifying story beats and letting you track their ups and downs from hope to fear and back."
<a href="http://gameplaywright.net/books/hamlets-hit-points/" rel="nofollow">http://gameplaywright.net/books/hamlets-hit-points/</a>
Vornheim: The Complete City Kit
"In addition to details on Vornheim, adventure locations, and player commentary from the I Hit It With My Axe girls, every single surface below this jacket – including the back of the jacket, the book covers underneath, and the inside covers – has been crammed full of tools to help you build and run a city in a First, Second, Third, or Fourth Edition game."
<a href="http://www.lotfp.com/store/index.php?route=product/product&product_id=67" rel="nofollow">http://www.lotfp.com/store/index.php?route=product/product&product_id=67</a>