The Darke King (The Broken Immortals Book 1)

Daniel Darke is an Earthborn warlock who is transported to a magical world when he follows the vision of a beautiful woman into a forest. He becomes a respected member of her family. After she's attacked and left for dead, Daniel swears to reclaim his ancestral kingdom for her and their child. After being properly mated to his wife, he begins having visions of other lifetimes and becomes even stronger. He understands that evil is coming for them and prepares his armies for war. While he is off doing his duties, the man who attacked his wife happens to come to the kingdom. Daniel has taken her memories of the attack, so she doesn't know she's in danger until the man who rescued her sees the attacker, but he escapes. The king goes in search of the attacker and defeats him. He and his family live happily ever after for now.