Want to learn more about the experience of what it was like to be a volunteer ambulance driver or camion driver during World War I? 

Many books were published during the War about the experiences of the drivers.  Above is a small selection of some contemporary works by drivers.  These are easy to find and also exist in digital versions.  Friends of France is a good place to start.  Published in 1916 to raise funds and awareness of the AFS, many later drivers such as Harry Crosby read this book.