Learn from others
Lots of books of veterinary have been published over the years but these three below are considered milestones and cannot be missed. Cowell and Tyler’s cytology book is particularly good if you start from scratch as it contains also lot of text and basic information, on top of beautiful pictures and useful diagnostic algorithms. Raskin’s beautiful book is more of an atlas and is a must. I can’t live without the “differential diagnosis” section of that book. Sharkey's veterinary cytology is a new textbook that offers a state-of-the-art, evidence-based reference to all aspects of veterinary cytology. I very much like the fact all chapters are written by clinical pathologists in collaboration with experts in other fields ranging from internal medicine, to surgery, ophthalmology, and dermatology, drawing the various specialties together to create a comprehensive picture of cytology's role in diagnosis and treatment of animal disease.
Cytology is important but a basic knowledge of pathology and clinical oncology is mandatory to be a good clinical pathologist. These two books below are a must and should be present on the bookshelfs of any veterinary pathologist.
Veterinary haematology by John Harvey is the reference textbook for haematology of domestic animals. Veterinary haematology and clinical chemistry by Mary Anna Thrall is my guilty pleasure; it is very pleasant to read and beautifully combines haematology and clinical biochemistry.