Written in Red: A Spy Thriller Set in Oxford with Echoes of the Cold War, Dalton Annie

Shortly before Christmas, Professor James Lowell is found brutally attacked in his rooms at Walsingham College, where Anna Hopkins works as an administrator. Baffled as to why anyone would wish to harm such a gentle, scholarly man, Anna discovers that Lowell had a connection with her fellow dogwalker, Isadora Salzman, who knew him as an undergraduate in the 1960s, a co-member of the so-called Oxford Six. It turns out that Isadora has been keeping a surprising secret all these years. But someone else knows about Isadoras secret: someone who has sent her a threatening, frightening letter.