Return of the Vhalgenn, an upcoming sequel to The Last Vhalgenn (set in a related part of this multiverse) will contain crossover characters from Trailing Kaiwulf.
Gates of Life Series
When Raik took the newborn prince to his homeland for a ritual, she never dreamed what she would bring back.
The Vhalgenn is a warrior, bedmate, soulmate, companion, and friend. Trusted by the king. Hated by the queen.
To save the newborn prince, the Vhalgenn will risk her position, her honor, and death itself to honor the Old Ways.
But when she takes the newborn prince to the queen's homeland for a ritual blessing, Raik discovers a betrayal so deep the kingdom -- and her heart -- might never recover...