Legend of the Jade Phoenix I.  In the 31st century, the BattleMech is the ultimate war machine. Thirty meters tall, and vaguely, menacingly man-shaped, it is an unstoppable engine of destruction.

In the 31st century, the Clans are the ultimate warriors. The result of generations of controlled breeding, Clan Warriors pilot their BattleMechs like no others.

In the 31st century, Aidan aspires to be a Warrior of Clan Jade Falcon. To win the right to join his Clan in battle, he must succeed in trials that will forge him into one of the best warriors in the galaxy, or break him completely.

In the 31st century, Aidan discovers that the toughest battle is not in the field, but in his head - where failure will cost him the ultimate price: his humanity.  Cover art by Bruce Jenson. 

Paperback; Roc 1991; very faint shelfwear otherwise near fine.

https://cosmiccauldronbooks.com.au/products/battletech-legend-jade-phoenix-vol-2-blood-name-robert-thurston