Dr Helen Castor studied for her BA and PhD at Gonville and Caius College, Cambridge, and was elected to a Research Fellowship at Jesus College, Cambridge, in 1993. In the following year she was appointed Fellow and Director of Studies in History at Sidney Sussex College, Cambridge.
She remains a Bye-Fellow of Sidney Sussex College, but since 2002 she has concentrated on writing history for a broader readership. Her book Blood & Roses is a biography of the fifteenth-century Paston family, whose remarkable letters are the earliest surviving collection of private correspondence in the English language. Blood & Roses was longlisted for the Samuel Johnson Prize for Non-Fiction in 2005, and was awarded the Beatrice White Prize (for outstanding scholarly work in the field of English Literature before 1590) by the English Association in 2006. Her next book, She-Wolves: The Women Who Ruled England Before Elizabeth, was widely selected as one of the books of the year for 2010.
In 2011, Helen became one of the presenters of Radio 4's Making History, and began to present history documentaries - including three programmes based on She-Wolves - for BBC television.