Mark Alfred Guido Tedeschi, AM, QC (born 1952) is an Australian barrister, law professor, photographer and author. He has won numerous awards for his photography and has been featured in galleries throughout the world including in the State Library of New South Wales, the New South Wales Art Gallery, the Center for Fine Art Photography in Colorado, and the National Library in Canberra. He is the Senior Crown Prosecutor for New South Wales and the Head of Chambers of the 84 Crown Prosecutors. He is the founder and president of the Australian Association of Crown Prosecutors and a visiting professor at the University of Wollongong. As a prosecutor, Tedeschi is best known for the prosecution of numerous high-profile cases in Australia including the 2006 conviction of Dr. Suman Sood for illegal abortion and the Backpacker Murders committed by Ivan Milat in the 1990s.

Tedeschi is the author of two books, one on law and the other on photography. In 1980, he co-authored Law of International Business in Australia with Dr. P.J. O'Keefe. He released a book of photograph in 2012 entitled Shooting Around Corners which featured over twenty five years of his photography.

Tedeschi is the author of a true crime book called Eugenia, published in 2012 by Simon & Schuster, which tells the story of Eugenia Falleni, a woman of Italian and New Zealand background who lived in Australia as a man from 1898 until she was charged with the murder of her first "wife" in 1920. In this book, Tedeschi describes the tortuous life that Eugenia Falleni led as a woman trying to lead life as a man in a society that did not understand such things. He describes her murder trial in Sydney in 1920 in which she was prosecuted by the first Senior Crown Prosecutor, William Coyle KC. Part of the book describes this very complex and interesting trial, and Eugenia Falleni's life after her trial.

Kidnapped will be published by Simon & Schuster in 2015.