American Dragons: Books 4 - 6 (Texas Showdown, California Imperium, Dodge City Knights)

Summary

When Legends Live, Dragons Die

Steven Drokharis is on an impossible quest to find the Holy Grail. The Dragonknights came close, but then their ranks were decimated by the mysterious Dragon Slayer, a legend that still fills Primes with terror. Standing in Steven's way are ancient forces that have been waiting for the Lost Son and Merlin's Daughter to continue the hunt. And yet, war has come to Steven's doorstep, and he must balance defending what he's earned with his greater ambition of bringing revolution to Dragonsouls everywhere.

Once again, Steven must gather his allies while his enemies across the world conspire to destroy him. And the greatest villain might be in his own ranks. Tessa stands on the razor's edge of good and evil, tempted. Can Steven and the beautiful women of his Escort save her very soul?

Or will Tessa murder the last of the Dragonknights before Steven can unearth the ultimate weapon?