Book: Spellslinger
Publisher: Fantasy Flight Games
Price: $14.95
Why: Does an excellent job of blending Wild West and fantasy. Uses a feat-based spellcasting system that I find quite intriguing and refreshing.
Book: Oathbound: Domains of the Forge
Publisher: Bastion Press
Price: $39.95
Why: A capstone campaign setting that is high fantasy (characters start out at 7th level) and has the same feel as Planescape and the attitude of Dark Sun. I've seen it used for standard fantasy and modern campaigns.
Book: Torn Asunder: Critical Hits
Publisher: Bastion Press
Price: $22.95
Why: Expands upon the current critical hit system and gives combat a more intense and gritty feel when critical hits are scored. The book also presents new healing rules that complement the critical rules.
Book: The Second World Sourcebook
Publisher: Second World Simulations
Price: $29.99
Why: Ingenious way to present a campaign setting that allows not only traditional fantasy but also d20 Modern. Has some deep concepts and isn't for the novice GM, however. Read some of the reviews here on EN World about it.
Book: Spellbound: A Codex of Ritual Magic
Publisher: Living Imagination, Inc.
Price: $19.95
Why: A comprehensive ritual magic system for arcane spellcasters. I like it much better than the one in Sword & Sorcery's Relics & Rituals. Uses a material component called corba as the primary fuel, which allows the GM a measure of control in the number of rituals a character conducts.
I also cast my vote for Spycraft (great game), Psychic's Handbook (much better than Psionic's Handbook), and Mutants & Masterminds. You should also take a good look at d20 Modern. With some work, you can make it mesh with Spycraft quite nicely.
