Can you give me the name of the author you mention in your Revelation study?
The author we mentioned in the Revelation course is Dr. Arnold Fruchtenbaum. His excellent book is called The Footsteps of the Messiah, and you can purchase it either from Dr. Fructenbaum's ministry directly or through Amazon.com.
We also encourage you to spend some time on the Ariel Ministries website. Ariel Ministries is based here in San Antonio, and it is an excellent teaching resource for any student who desires a deeper understanding of the Jewish roots of scripture and our Christian faith.