Reasoner has used at least nineteen pseudonyms, in addition to his own name: Jim Austin; Peter Danielson; Terrance Duncan; Tom Early; Wesley Ellis; Tabor Evans; Jake Foster; William Grant; Matthew Hart; Livia James; Mike Jameson; Justin Ladd; Jake Logan; Hank Mitchum; Lee Morgan; J. L. Reasoner (with his wife); Dana Fuller Ross; Adam Rutledge; and Jon Sharpe.
His wife also became a fiction writer of some distinction and has written more than 25 books, including several co-written with Reasoner.
[1][2][3] Reasoner's primary focus over the years has been on fictional stories of the old west, with more than 100 of his novels having been in this genre.
A majority of his western novels were written for the established western fictional series of several publishing houses that sometimes used other authors to work on these series, hence the use of "house" pseudonyms for these novels determined by the publisher.
These books provided fictional accounts of American frontier pioneering following the Lewis and Clark expedition in the early 1800s.