I have just finished updating my book, Tennessee Zoning Boards: Practice and Procedure, which should be available on Amazon soon. The book adds sections devoted to the Tennessee Religious Freedom Restoration Act, conditions on granted applications, non-conforming uses and others. The last chapter is particularly valuable covering the common law writ of certiorari in detail, as well as including a sample form petition, and a list of the critical components which must be included in the petition.
Take a look and pick up a copy if you do any work before a zoning board or ever file cert petitions.
The book is also available for purchase ($25) here.