With magic, dabbles at this level translate to RPG's 'players', while the professional term really fits 'GMs'. Let's look at what Practitioners do. They buy gear. They buy books. First off, for magic Content is King.
Most magic books are rules books.
They give tricks and presentations and patter, in an orderly fashion. A book may be praised for having 'useful illustrations' that better define what is happening, but rarely is the art commented on in an aesthetic sense. Indexes are luxuries. Sometimes, spell-checkers are luxuries. In many ways, this echoes the earlier days of RPGs, when a photocopies set of rules was 'a viable product'.