Wonder of the Worlds, 2005 novel by Sesh Heri starring secret agent Harry Houdini

Wonder of the Worlds (2005), a novel written by Sesh Heri, is a scientific adventure in which secret agent Harry Houdini journeys to the Red Planet with scientist Nikola Tesla and author Mark Twain to retrieve a crystal stolen by Martian agents from the 1893 World’s Columbian Exposition in Chicago. Here’s the product description from Amazon:

An adventure for all times! Mark Twain teams up with Nikola Tesla in this historical fantasy pitting them against secret agents from Mars. These Martians have been sent by their tyrannical emperor to steal Tesla's latest and greatest invention: a crystal engine! Along with reporters Lilly West and George Ade, and the young Harry Houdini, Twain and Tesla journey to Mars aboard a fantastic flying machine to take on the conquest-driven Martians! This is an adventure in the tradition of H G Wells and Jules Verne!

Apparently, Sesh Heri has developed his own scientific theory of geomorphology.