Revolución y contrarrevolución en México y el Perú es un estudio acucioso acerca de la transición de virreinatos a Estados soberanos de los dos grandes centros-ejes del dominio español colonial. El periodo estudiado (de 1800 a 1824) muestra el efecto del constitucionalismo español y de los movimientos revolucionarios hispanoamericanos en los gobiernos realistas, representantes del poder peninsular.
Brian Hamnett is a Research Professor in History Emeritus at the University of Essex, where he taught from 1990 until his retirement. Hamnett studied as an undergraduate and postgraduate at Peterhouse, Cambridge, and then became Assistant Professor in History at the State University of New York at Stony Brook, USA, from 1968 to 1972. After a period at the University of Reading (1972-74), he taught at the University of Strathclyde (1974-90) where he became a Reader in 1989. From 1990-95 he was joint Editor of the Bulletin of Latin American Research, and has been a member of the Editorial Board of the Journal of Latin American Studies and of the International Advisory Boards of the European Review of Latin American and Caribbean Studies, and is also a Fellow of the Royal Historical Society and Correspondent of the Academia Mexicana de la Historia. He was Director of the Latin American Centre (1994-97). In March 2010, Professor Hamnett was awarded a Banco Nacional de Mexico prize for Foreign Scholar working on Mexican Regional History.