Book One follows four Heroes from Earth who journey to Kismeria where they join elves and mortals to battle demons, vampires, werewolves and goblins, with the aid of immensely powerful Battle Angels who wreak havoc upon their enemies with Elemental Magic of the ancients.
Book One of the Sons of Odin received these quotes from Kirkus -
the novel has a wealth of plot and spends more time relaying information than describing action, but when the action comes, it's exhilarating . . .
A complex fantasy novel brimming with weird and whimsical details.
Book Two of the Sons of Odin received these quotes by BlueInk Reviews:
Hammer's vivid visual imagery makes the characters' journeys exhilarating and the battle scenes intense . . .
Druantia's Curse is entertaining and full of surprises, from vampires to wormholes. Casual readers of fantasy may be frustrated by the wealth of detail, but die hard fans will appreciate the Robert-Jordan-esque layering of characters, relationships and lands that brings Kismeria to life.
The reference to adult content is simply that there are quite violent battle scenes that may disturb young readers, romance scenes are very subtle but I have placed a minimum reader age recommendation just in case.