A mug book is a collection of photographs of criminals, typically in mug shots taken at the time of an arrest. A mug book is used by an eyewitness to a crime, with the assistance of law enforcement, in an effort to identify the perpetrator.   Research has shown that grouped photos result in less false-positives than individually displaying each photo.
- Thetford, Robert T., Mug Shots, Mug Books, and Photo Spreads, Institute for Criminal Justice Education, Inc (ICJE)
- NIJ training manual on the use of mug books and composites with eyewitnesses
- Stewart, Heather A.; Hunter A. McAllister (2001). "One-at-a-time versus grouped presentation of mug book pictures: Some surprising results.". Journal of Applied Psychology 86 (6): 1300–1305. doi:10.1037/0021-9010.86.6.1300. ISSN 0021-9010. PMID 11768071. Retrieved November 9th 2010.
- Frevert, Rhonda, Tales From The Vault: Mug Books, Common Place Vol. 3 No. 1 (October 2002)
- Collected Biography, Ancestry Magazine Vol. 13 No. 4 (July/August 1995)
- Conzen, Michael P., "Local Migration Systems in Nineteenth-Century Iowa", Geographical Review, Vol. 64 No. 3 (July 1974), p. 341
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