The book is dedicated to Follicular lymphoma and Mantle cell lymphoma and highlights major reference works that contributed significantly to the understanding of these two lymphomas. The aim is to bring the basic science adjacent to the applied science. There is significant focus on the biology of normal B cell development that forms the basis for understanding the pathobiology of these entities.  This text is designed to provide a concise yet comprehensive summary of traditional and newer entities, prognostic markers, pathobiology and newer classifications based on molecular genetics/chromosomal abnormalities. The chapters are written by practicing hematopathologists, molecular pathologists, dermatopathologists  and clinical haematologists with an emphasis on practical approaches to these entities.  The newer technologies and their practical applications are elaborated in an easy-to-comprehend format. Follicular Lymphoma and Mantle Cell Lymphoma is an approachable read for residents and  fellows and clinically relevant to practicing pathologists and hematologists. It also serves as a valuable resource for anyone with an interest in B cell lymphomas.