Lake Wobegon Summer 1956 by Garrison Keillor (2001, Hardcover).

During the summer of 1956, fourteen-year-old geek Gary struggles with the hormonal pains and obsessions of puberty as he experiences a passionate devotion to his rebellious cousin Kate and pursues his dream of becoming a writer, but when Kate gets into trouble with the local basketball star, Gary is forced to deal with the first pangs of a broken heart. 250,000 first printing.