One Night in a Dungeon by Shay Savage

Rocco, isolated by his horrific past and imprisoned in the impenetrable cage of his own mind, knows how damaged he is. Resigned to a lonely fate, he finds solace in the bonds of a shibari rigger’s ropes.
Casey is determined to use her newfound rope skills to break through to the flawed, submissive Rocco. She knows her dominant personality and newfound expertise will benefit the young man, but her own childhood trauma may jeopardize teaching the anxious, introverted virgin the more intimate ways of rope and endanger the promising relationship between them.
One night in a dungeon, two broken souls will be bound together.