The search for Asgaard - Book 1 of The agent of Valhalla series

Fandral is dead and honestly no matter how luxurious life is in Valhalla and how complient the women are, well being dead don't sit well with him. He is bored and feels he lacks purpose.
So despite not really having any use for his skills as Asgaard has been destroyed, he keeps training, keeping himself in shape.
And one day he is called to Odin, the late King of Asgaard needs his help..

Kari Selvig is the daugther of Eric Selvig, she is 31 years old and an expert in norse mythology, she is also a fencing champion and was an agent of S.H.I.L.D when it still excisted. She has returned home to find her fathers house empty.

Where is her father ? Can she trust the handsome man suddenly showing up claiming to be a dead Asgaardian warrior even though he doesn't excist in the mythology.

And who is out to capture Kari and why ?