King of Kings by Michael-Scott Earle

Adam and his wives set their sights on the last of the Nordar Blood Overlord Clans. The Jotnar are devious, powerful, and know that the tiger is coming for them.

Our heroes have hatched a daring plan to sneak behind the Jotnar lines. To most, it would be suicide, but to Adam, it is just another day of being the galaxy’s more powerful King. Nothing will stand in his way, and finally the clans will be united.