About Achim K. Krull Books by Achim K. Krull GED Science For Dummies by (author) Murray Shukyn & Achim K. Krull GED Social Studies For Dummies by (author) Achim K. Krull & Murray Shukyn GED RLA For Dummies by (author) Achim K. Krull & Murray Shukyn GED Mathematical Reasoning Test For Dummies by (author) Murray Shukyn & Achim K. Krull CliffsNotes GED TEST Cram Plan Second Edition by (author) Murray Shukyn, Dale E. Shuttleworth & Achim K. Krull