Book excerpt: This book on hematology provides significant information about blood cells to help develop a good understanding of this subject and related fields. Blood cells or haematopoietic cells are the cells found in blood and are produced by hematopoiesis. The three main types of blood cells are white blood cells, red blood cells and platelets. Together with plasma, these blood cells form blood in our body. This book unfolds the innovative aspects of hematology which will be crucial for the progress of this field in the future. This text includes some of the vital pieces of work being conducted across the world, on various topics related to blood cells. Students, researchers, hematologists and all associated with this subject will benefit alike from this book.