Jane Godman 
One Night with the Valkyrie [EPUB ebook] 

Falling for the immortal warrior princess…While tracking down his beloved brother, billionaire Adam Lyon is struck dumb by a vision of a beautiful woman in armor. But when this vision comes to life, she turns his entire world upside down. Adam soon discovers that valiant Valkyrie Maja is a dream come true, but their passion violates the gods’ laws. Maja brings heroic souls to Valhalla, so why did she spare one mortal man’s life? Not only does that violate Odin’s orders, but she soon finds herself swept up in an illicit desire for sexy Adam. Battling to save their very lives, the CEO and the shield maiden find their forbidden love hangs in the balance—as does the fate of the world…