Riding Out the Regrets. The Father Michael Trilogy, #2

Father Michael returns home late to find an old college roommate sitting on his doorstep: Father Dan has been kicked out by his wife and needs somewhere to stay. In the past, Jack Harper's horses have always helped solve people's problems and Father Michael appeals to the equine trainer for assistance in reconciling the married couple. But the outcome is devastating. Not only that, but veteran Justin Chambers and his estranged spouse Elizabeth are at each other's throats.
As if that weren't enough, the pastor's ex-girlfriend shows up, rekindling emotions Father Michael thought he'd dealt with long ago. The world of evil is crushing his soul as he struggles to live up to his priestly calling and fight off the devil's onslaught.