Exley put all he had into his books, and what he had, besides his talent, was shockingly  a troubled heart, a bottle, an affection for the home team, and a cacophony of chemical imbalances.
Exley's troubled heart came from a genetic disease.
mnli hypothesis: Exley's troubled heart came from a genetic disease. premise: Exley put all he had into his books, and what he had, besides his talent, was shockingly  a troubled heart, a bottle, an affection for the home team, and a cacophony of chemical imbalances.