First Source

Zwischen den Fronten - A new Chapter (First Source Security 3)

Zwischen Zukunft und Vergangenheit (First Source Security 2)

Zwischen Liebe und Lüge - Verbranntes Vertrauen (First Source Security 4)

Independently published

Versprechen zwischen Ruinen (First Source Security, Band 1)

Capstone Press

First Source to BMX Racing: Rules, Equipment, and Key Riding Tips (First Sports Source)

Summersdale

Canoeing the Congo: The First Source-to-Sea Descent of the Congo River (English Edition)

Capstone Press

First Source to Baseball: Rules, Equipment, and Key Playing Tips (First Sports Source)

First Source, Volume 1                          

Capstone Press

First Source to Gymnastics: Rules, Equipment, and Key Routine Tips (First Sports Source)

Capstone Press

First Source to Basketball: Rules, Equipment, and Key Playing Tips (First Sports Source)