This book is quick guide on the hematopoietic stem cell transplant (SCT), also called bone marrow transplant (BMT) - an evolving field of hematology and hemato-oncology. This book covers the various types of stem cell transplants like autologous and allogeneic stem cell transplants, indications, ways of doing a transplant, and stem cell transplants basic principles. Written in a question-answer format, readers will find it more interesting as one question sequentially leads to another. This book explains the complications of SCT in individual chapters along with the biology of T cells which are the most important cells involved in the success of SCT This book is beneficial to the budding hematologists, oncologists, and postgraduates interested in SCT and helps students in their exams. The book would be helpful for readers globally as SCT is a procedure done worldwide and is an ever-increasing field for treating various benign and malignant hematological diseases.