She named her six best books for the Daily Express. One novel on the list:
Tinker, Tailor, Soldier, SpyRead about another book on Rimington's list.
by John le Carré
Many of the characters are reminiscent of people I met when I joined the security services in the Seventies. However, the plotting is just brilliant and, while a lot of it is made up, it’s a fantastic read. A classic Cold War novel.
Also see Rimington's five best list of books about spies in Britain.