The classic is the companion to ACI 530. - It is called the Masonry Designers Guide (MDG). It is usually released slighly later the the ACI 530, since it involves the practical applications and relationship to the major model codes.
In most metro areas, there are one-day masonry seminars sponsored by ACI groups and local masonry groups. The presenters are the people that were involved in the writing and updating of ACI 530. Often, hard copies of the two documents (ACI 530 and MDG) are included or offered at a discount. A CD is also available.
If you are a member of the ACI or The Masonry Society (TMS) discounted prices are available. The MDG is not a flimsy throw-away document, but a comprehensive document including examples of the use of ACI 530 in real life.
Dick