"Keeping Healthy Honey Bees" by David Aston & Sally Bucknall, published in 2010 by Northern Bee Books, ISBN No. 978-1-904846-54-3 RRP £16.99.
This is a book used by Bee Inspectors and is a very readable text book.
I think that A....zon may have it or any reputable bookseller would get it for you