Unless things have changed in the years since I've been at CCM, Mr. Laszlo doesn't publish his book. But, you can get in touch with him through the CCM website and purchase a copy directly from him. He used to charge $10.
It's a book full of exercises that is a supplement to his teaching. It's a little hard to understand if you don't study with him or don't know somebody who has. But, its full of his right hand and left hand exercises as well as his approach to practicing scales.
Albert Laszlo's The Double Bass Workbook 
