John Meheagan wrote a series of jazz piano instruction books, "Contemporary Styles for the Jazz Pianist" which were considered pretty good at one time, mostly for the left-hand chord voicings. A lot of this stuff is old-hat by now, but at the time this may have been the only place to read about this kind of thing. I've never heard his recordings. How would you describe his style?
He's "Progressive," allegedlly taking the best elements of bop but restoring the left hands of Jelly Roll Morton and Art Tatum. To me, he sounds stiff and very much like a Classical pianist trying to play jazz. The record is part-solo piano, and part piano-drums (Kenny Clarke). The liner notes are a lecture by "Uncus" about the influence of Classical music on jazz: e.g., "West Coast Progessive (1948-): basic Neo Classic influence, Bach, Handel. Modern Classicism--Hindemith."
I have another pretty rare ten inch John Mehegan, From Barrellhouse to Bop, with Charles Mingus on bass. Despite the presence of Mingus, I don't like this one either.