From publisher blurb:
The E.N.Arsenal strikes again, with volume three, detailing the fictional two-bladed sword, the exotic fighting styles it entails and requires, and those who wield it.
E.N. Arsenal books are "crunch-intensive" - a majority of the PDF is devoted to rules-based material regarding the topic of the book; in this case, the two-bladed sword and variants.
This e-book includes:
Statistics for two-bladed swords of Tiny through Colossal size.
The new "drow masters" - trained in the drow fighting academies.
9 variants of the two-bladed sword, from two-bladed scimitars, to the sword-dagger.
9 Feats for the wielders of these versatile weapons.
Two fighting styles exclusively for wielders of these deadly blades.
Three prestige classes dedicated to the weapon.
The Keltath Master who wields the two-bladed sword with style, grace and deadly fluidity.
The Dual Soulblade, who manifests the mindknife as a double weapon and learns new tricks and powers for it.
The Warrior of Annakra, who wields the two-bladed sword with the skill and guidance of an ancient and long-dead warrior.
Spells & magical weapon enhancements.
4 Specific magical two bladed swords, including the Cyclone Sword and the Wrath of the Rider.
Sevesties, the Double-Edged God, a deity of weapons, warfare and metallurgy.