- PassKey Learning Systems EA Review Part 1 Individuals; Enrolled Agent Study Guide: July 1, 2019-February 29, 2020 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 Complete: Individuals, Businesses, and Representation: Enrolled Agent Exam Study Guide 2018-2019 Edition (Hardcover)
- PassKey Learning Systems EA Review Part 1 Individuals; Enrolled Agent Study Guide: May 1, 2020-February 28, 2021 Testing Cycle
- PassKey Learning Systems EA Review Part 1 Individuals: Enrolled Agent Study Guide, May 1, 2021-February 28, 2022 Testing Cycle (IRS May 1, 2021-February 28, 2022 Testing Cycle)