Howes was a curator of the Type Museum of London and wrote on the work of Edward Johnston and William Caslon; his book Johnston's Underground Type on the Johnston lettering commissioned and used by London Underground and its predecessors remains the standard work on the topic. He also worked as a book and font designer and was working on a PhD at the time of his death.
- Barker, Nicolas. "Justin Howes: Historian of typography". The Independent. Retrieved 4 September 2016.
- Gruendler, Shelley. "Justin Howes". Typographica. Retrieved 4 September 2016.
- Mosley, James. "The Nymph and the Grot: an update". Typefoundry blog. Retrieved 12 December 2015.
- Kinross, Robin. "Justin Howes". The Guardian. Retrieved 4 September 2016.
- Howes, Justin (2000). "Caslon's punches and matrices". Matrix. 20: 1–7.
- Howes, Justin. "The Compleat Caslon". Matrix: 35–40.
- Howes, Justin. "Welcome to H. W. Caslon and Company Limited". H. W. Caslon and Company Limited (Archive image from 2004). Retrieved 2 November 2017.
- Howes, Justin; Mosley, James; Chartres, Richard. "A to Z of Founder's London: A showing and synopsis of ITC Founder's Caslon" (PDF). Friends of the St. Bride's Printing Library. St Bride Library. Retrieved 28 September 2017.