"shadow country" peter matthiessen a novel, a mystery, insight into human nature, a thriller, and it's many many pages so it lasts a long time.
"at play in the fields of the lord" peter Matthiessen Missionaries go wrong in a heathen jungle. a novel, a mystery, insight into human nature, insight into the pursuit of identity.
"Swain's Folly" by me (cough cough) for INTP by INTP, a novel, a mystery, some adventure, unrequited romance, humor, and, what every INTP secretly dreams will happen, a somewhat INTPish protagonist who uses his chameleon aspects and decent voice to stumble into an odd niche as a pop star but still wonders if he'll actually get the girl he can't get out of his head. Sort of like "The Count of Monte Cristo" by Alexander Dumas, but with a whole lot more self-deprecating humor.
As an aside (I am, after all, INTP) Alexander Dumas' novel was written as serial installments for a Paris newspaper in the 1800s;because of the medium used and the interval between installments, he perfected the art of chapter endings that left you hanging and waiting to find out what happened next. Some things never change.