- Passkey EA Review, Complete: Individuals, Businesses, and Representation: IRS Enrolled Agent Exam Study Guide 2017-2018 Edition
- PassKey Learning Systems EA Review, Part 1 Individuals, Enrolled Agent Study Guide: May 1, 2022-February 28, 2023 Testing Cycle
- PassKey Learning Systems EA Review Part 2 Businesses Enrolled Agent Study Guide, May 1, 2022-February 28, 2023 Testing Cycle
- PassKey Learning Systems EA Review Part 3 Representation: Enrolled Agent Study Guide: May 1, 2021-February 28, 2022 Testing Cycle
- Passkey Learning Systems EA Review Part 1, Individual Taxation: Enrolled Agent Study Guide 2018-2019 Edition (Hardcover)





























