Here's a list of books (not conclusive) that I have enjoyed and/or refer to quite frequently for information:
(Check back often as I'll continually update this list)
40 Days of Teshuvah by Perry Stone
The Messianic Church Arising! by Dr. Robert D. Heidler
The Seven Festivals of the Messiah by Edward Chumney
Also, www.hebrew4christians.com is a wonderful resource.