The irrepressible Mark Twain and his baffled new secretary, Wentworth Cabot, embark on a riverboat lecture series in the company of a New York cop and the killer the officer seeks. Reprint.

A sequel to Death on the Mississippi takes place in New Orleans, where a black man is wrongly accused of murder and on the verge of being executed, but famous author and sleuth Mark Twain will stop at nothing to prove the man's innocence. Reprint.

Mark Twain sets out on another journey via a luxury cruise, but his trip takes a very wrong turn after it is discovered that there is a murderer aboard the ship.

During a visit to England, famed author Mark Twain and his assistant, Wentworth Cabot, encounter "Slippery Ed," a New Orleans con man, who persuades them to attend a se+a7ance, but things begin to go awry when one of their fellow attendees turns up murdered. Original.

A trip to sunny Florence following a long lecture tour in England brings unexpected surprises for literary legend Mark Twain and his assistant, Wentworth Cabot, when they find themselves investigating the theft of a recently discovery Raphael masterpiece and the disappearance of a mysterious young woman. Original.

On a trip to Missoula, Montana, for a lecture tour, Mark Twain encounters his boyhood friend, Tom Blankenship, the real-life model for Huck Finn, who has become the target of a would-be blackmailer, but when the extortionist is found dead, and Tom is charged with the murder, it is up to Twain to defend his friend and find the real killer. Original.