Howard Adams has been around for a LONG time, and his specialty is self working and mathematical magic and mentalism effects. I have no idea how his mind can generate these kinds of effect with this much variety, but create he does.
Howard’s books and booklets have been released in series (Such as OICUFESP and MINDESPA) and in books by a variety of publishers. The commercial effect “Will the card match” is based on one of Howard’s principles. Look at any list of creators of easy to do, self-working card effects and Howard’s name will be high on the list. Howard’s contributions can be seen in Simply Impromp2