cormac
my favorite and the one i rely on the most is "The Tarot Workbook: A Step-by-Step Guide to Discovering the Wisdom of the Cards" by Nevill Drury -- a very straightforward, very well laid out book -- a good read and very convenient for quick reference to spark your memory -- it's geared toward the traditional Rider-Waite but is informative enough I think for general tarot knowledge