The only one I know off is "The Formation of the Cambridgeshire Constabulary 150 Years Ago" by Peggy Watts.Published in 2001 covers the very early years 1852-1856. Does not cover Cambridge Boro/City. To my knowledge there is nothing on the Isle of Ely,Peterborough had a book commemorating the first 100 years 1857-1957 and what I class as a definitive History of Huntingdonshire " A Brief History of the Force and those who served with Honour 1857-1965 by Dave Dodman and Roy Dudley. Any other information you require email me.