In addition to writing and recording, Slater coached many world-class pianists, and served as chairman and Artistic Director of the Peabody Mason International Piano Competition.
For his first book, Slater (the author's pen name since 1995) traveled to fifty-five cities in nine European countries and completed his research over three years with correspondence to archives throughout Europe, always posing unresolved questions about Mozart Gedenkstaetten – the palaces, concert halls and salons in which Mozart performed, the houses and taverns in which he lodged, and the churches and public edifices that he visited.
The resulting reference book, In Mozart's Footsteps,[3] has been called "an amazing feat of scholarship" by the pianist, Alfred Brendel,[4] while Nicholas Slonimsky described it as "absorbing in its brilliance".
[4] NightMusic was voted "Rising Star of 2003" by nine publishing houses, was on the Barnes & Noble bestseller list for mystery trade paperback for nineteen weeks and was optioned for a film.
[15] His present musicological work on the influence of the vocal nocturne on Chopin's piano music continues that research.
He resided in an historic apartment in Back Bay, Boston, as well as in Milan, Paris and Mount Holly Township, New Jersey.