On Wed, Oct 24, 2007 at 11:12:13PM -0700, Peter William Lount wrote:
  

An excellent book for learning the ins and outs of concurrency control - 
and most importantly the common mistakes - is the free PDF book, "The 
Little Book of Semaphores",  by Allen B. Downey and his students: 
http://www.greenteapress.com/semaphores/downey05semaphores.pdf.
    

Peter,
Thanks for this reference.
Dave