The Biology of Campbell & Reece - and their collaborators - is a general biology book tested in the international, highly competitive market, with long-term international recognition, scientific validity and appeal, especially in American and European universities. It combines modern biological knowledge with an effort for active learning on the part of the reader. The book is aimed at first and second year students of biological sciences, as well as any other branch of natural sciences - physics, chemistry, applied mathematics and informatics, geology, agriculture, biochemistry, etc. Most of its content is considered particularly suitable for the introduction to modern biology of medical school students and related schools. It can also be a valuable aid in Postgraduate Study Programs in the field of biology with biotechnology, informatics, bioethics, medical technology, biophysics, biochemistry, etc., since these programs involve postgraduate students with different scientific backgrounds. However, for the same reasons, the Biology of Campbell & Reece is also offered as a "reference book" for biology teachers in Secondary Education, who have remained without strong bibliographic coverage until today. The present Greek edition is based on the most recent, updated 8th English edition, which was released worldwide in 2009.