The book contains lotsa gd stuff that leads to a build up of proper control in one's strokes. And you said it... It contains rudiments in the form of single beat combinations, triplets, as well as some in 6/8, 2/4, that is to be played, as prescribed by the author, for 20 bars continously per exercise variation. It really does yield results!
An excerpt from the book reads, 'Practise at all times with relaxed muscles, stopping at the slightest feeling of tension. Remember, the rhythms in 'Stick Control' are 'conditioners'. They are designed to give control. Control begins in muscularly relaxed action.'