This attractive and handy book is intended as a practical guide to those whose work involves tracer techniques but whose time for a deep study of nucleonics and radiation measurement has been denied them. Although not specifically planned for the medical isotope technician, the subject matter and scheme of study is well adapted to the needs of many a new recruit to this field of work, such as a schoolleaver with O-level standards in physics (or general science) and mathematics. Not only would he be enabled to partake earlier and more meaningfully in the routine work, but his training by the senior staff would be facilitated, if backed by the study of this book.