Showing Everything Changes by Jonathan Tropper

To all appearances, Zachary King is a man with luck on his side. A steady, well-paying job, a rent-free Manhattan apartment, and Hope, his stunning, blue-blooded fiancée: smart, sexy, and completely out of his league. But as the wedding day looms, Zack finds himself haunted by the memory of his best friend, Rael, killed in a car wreck two years earlier - and by his increasingly complicated feelings for Tamara, the beautiful widow Rael left behind.

Then Norm - Zack's freewheeling, Viagra-popping father - resurfaces after a twenty-year absence, looking to make amends. Norm's overbearing, often outrageous efforts to re-establish ties with his sons infuriate Zack, and yet, despite twenty years of bad blood, he finds something compelling in his father's maniacal determination to transform his own life.

Inspired by Norm, Zack boldly attempts to make some changes of his own, and the results are instantly calamitous. Soon fists are flying, his love life is a shambles, and his once carefully structured existence is spinning hopelessly out of control.