We have 'The Cheltenham World of Jump Racing' by Mick Fitzgerald. He was winner of the Cheltenham Gold Cup in 1999 on 'See More Business' and is well known, since his retirement, as a TV presenter.
Also the excellent and recently published 'The Masters of Manton'
The Centenary History looks a good bet too. This hardback is by Robin Oakley so there's pedigree there.