This text is focusing on the essentials in molecular oncology. In particular, signaling pathways, critically involved in a large number of cancers are covered in detail. The book is written in an easy to read textbook style and includes a number of professionally designed animations. These movies are partly integrated into the e-book and make this book an ideal vehicle for visual based-learning. The first part of the book gives an introduction into the cell and molecular biology of cancer biology focusing on the key mechanisms in cancerogenesis. The second part of the book then introduces the main signaling transduction mechanisms involved in cancer formation and gives an attractive side by side comparison of the normal cellular function of these cascades with aberrations during cancerogenesis. The book covers the must have background not only for students aiming for a career in biomedical research but also for all MDs specializing in oncology.