Gregson, Jonathan (1997). Bullet up the Grand Trunk Road. London: Sinclair-Stevenson. ISBN 9781856196604.

Hartley, Peter (1981). The story of Royal Enfield motor cycles. Cambridge Cambridgeshire: P. Stephens. ISBN 9780850594676.

Köster, Dirk W. (16 April 2007). Royal Enfield : une légende vivante (in French). Boulogne-Billancourt: ETAI. ISBN 978-2726887073.

Köster, Dirk W. (1 August 2009). Royal Enfield – die Legende lebt (in German) (Lizenzausg. ed.). Münster: Monsenstein & Vannerdat. ISBN 978-3938568927.

May, Gordon G. (2005). Royal Enfield : the legend rides on : celebrating 50 years in India (1st ed.). Chennai, India: Royal Enfield. ISBN 978-8190312905.

May, Gordon G. (30 November 2008). Overland to India: An 8400 Mile Adventure on a 55-year-old Motorcycle. Rixon Groove. ISBN 978-0956116802.

May, Gordon G. (2014). Made in India – The Royal Enfield Bullet (4th ed.). Stockport, Cheshire: Royal Enfield Books.

Walker, Mick (24 February 2003). Royal Enfield : the complete story. Marlborough, Wiltshire: Crowood. ISBN 978-1861265630.

Wilson, Steve (18 September 2000). Down the road : genuine mileage on classic motorcycles. Sparkford: Haynes. ISBN 9781859606513.