Pests and Disease
For ease this subject is divided between general pests and diseases .
The first stop for beekeepers looking for advice in the UK must be Beebase. It is the website of the National Bee Unit and is full of facts rather than opinion.
The only book you will need for disease and invertebrate pests. It approaches the subject scientifically in a no nonsense way. If you only buy one book buy this one *****
Scientific Beekeeping