Like most of the Radovan & the Count stories, Lord of Runes begins with a mystery. You can read the first chapter, featuring the first clues of that mystery, at the Paizo blog.
And bonus! Here’s another terrific illustration of Count Varian Jeggare by the estimable Eric Belisle. Keen-eyed readers will realize that the weapon he’s wielding is a katana rather than a jian, as I envisioned the Shadowless Sword. But hey! Katanas look cool, too.