Unfortunately, there iare no recently published books that looks exclusively at the Queen's maids of honour. However, there is:

Violet Wilson's Queen Elizabeth's Maids of Honour and Ladies of the Privy Chamber (now unfortunately out of print)

Anne Somerset's book LADIES-IN-WAITING: From the Tudors to the Present Day 

There is also an excellent unpublished Ph.D thesis by  Charlotte Merton, The Women that served  Queen Mary and Queen Elizabeth (Cambridge University)
 
 
 
 
 
 

If you can't find what you are  looking for, try searching on  the world wide web:   Web www.elizabethi.org