Roberto Giobbi is famed as the author of the supremely excellent Card College series of books, and deservedly so. They are the finest course in card magic extant and simply fabulous. His other contributions to the art are turning out to be equally impressive, Mr. Giobbi has an excellent mind for keeping track of all the great developments in card magic, and elsewhere it seems, and organizing them into a gestalt that is beautiful to behold.
Recently, he has been doing an excellent workshop on the Professor, Dai Vernon, which is a must see, if you have the opportunity, and there are also excellent notes available documenting much of the content he discusses during the workshop. Further, he has been supplementing the Card College series with some video companions to the work which are very well produced and wonderful (hopefully the series will continue!), as well as the Card College Light trilogy that presents self working card effects in the same thorough detail as the sleight of hand books.