Strength To Let Go - Alina Popescu - Tales of the Werewolf Tribes tome 1

After being abandoned by his mates, Shiki Kirishima, beta of the Dragons of the Fang werewolf tribe, returns to his home in Tokyo.
Crippled by grief, Shiki decides to end it all by going into the territory of the Siberian Killers tribe and challenging them to a battle to the death.
His death.
Ganzorig, beta of the Siberian Killers, however, sees the potentially disastrous consequences of having Shiki die in battle.
Instead, he saves him.
Having suffered loss himself, Ganz takes it upon himself to help Shiki deal with his pain.
Blake, Shiki’s best friend since childhood, is as determined to show him there is life after a wolf’s ultimate loss.
Could there also be something ‘more’ for them after friendship?