You can get your hands on Robert McCammon's Mister Slaughter for only 1.99$ here.
Here's the blurb:
The world of Colonial America comes vibrantly to life in this masterful new historical thriller by Robert McCammon. The latest entry in the popular Matthew Corbett series, which began with Speaks the Nightbird and continued in The Queen of Bedlam, Mister Slaughter opens in the emerging metropolis of New York City in 1702, and proceeds to take both Matthew and the reader on an unforgettable journey of horror, violence, and personal discovery. The journey begins when Matthew, now an apprentice “problem solver” for the London-based Herrald Agency, accepts an unusual and hazardous commission. Together with his colleague, Hudson Greathouse, he agrees to escort the notorious mass murderer Tyranthus Slaughter from an asylum outside Philadelphia to the docks of New York. Along the way, Slaughter makes his captors a surprising--and extremely tempting--offer. Their response to this offer will alter the course of the novel, setting in motion a series of astonishing, ultimately catastrophic events. Mister Slaughter is at once a classic portrait of an archetypal serial killer and an exquisitely detailed account of a fledgling nation still in the process of inventing itself. Suspenseful, illuminating, never less than compulsively readable, it is, by any measure, an extraordinary achievement, the largest accomplishment to date from one of our most gifted--and necessary--writers.
You can also download the sequel, The Providence Rider, for the same price here.
Here's the blurb:
The Providence Rider is the fourth standalone installment in the extraordinary series of historical thrillers featuring Matthew Corbett, professional problem solver. The narrative begins in the winter of 1703, with Matthew still haunted by his lethal encounter with notorious mass murderer Tyranthus Slaughter. When an unexplained series of explosions rocks his Manhattan neighborhood, Matthew finds himself forced to confront a new and unexpected problem. Someone is trying—and trying very hard—to get his attention. That someone is a shadowy figure from out of Matthew’s past: the elusive Professor Fell. The professor, it turns out, has a problem of his own, one that requires the exclusive services of Matthew Corbett. The ensuing narrative moves swiftly and gracefully from the emerging metropolis of New York City to Pendulum Island in the remote Bermudas. In the course of his journey, Matthew encounters a truly Dickensian assortment of memorable, often grotesque, antagonists. These include Sirki, the giant, deceptively soft-spoken East Indian killer, Dr. Jonathan Gentry, an expert in exotic potions with a substance abuse problem of his own, the beautiful but murderous Aria Chillany, and, of course, the master manipulator and “Emperor of Crime” on two continents, Professor Fell himself. The result is both an exquisitely constructed novel of suspense and a meticulous recreation of a bygone era.