I've been doing some background reading before I start work on the sepoys and native troops.
Firstly a good read on the life of' Lord Clive, Colonel G.B. Malleson; published orginally in 1893,
Malleson also wrote a book about the frenchman Dupleix (Title: Rulers of India, Dupleix).Secondly 'Britains Army In India' by James P Lawford, covers the period from the inception of the East India company up to the end of the Seven Years War.