Gordon Phillips 
In the Cool of the Evening [EPUB ebook] 

When recent college graduate Mark decides to visit to Europe to see the culture, a friend gives him a letter of introduction to an elderly man in Paris who "might be worth visiting."During their visit, the Parisian reads Mark a letter from a friend about a heart-breaking romantic gay encounter in a tiny Balkan town. Years have passed and the letter writer can’t find the town or person again, and has been haunted by this loss ever since.The letter remains with Mark even after he returns home. It opens his eyes to sights and people he wouldn’t normally pay attention to. Can the new life lessons he’s learned help him in his own search for lasting love?