After a master's degree and several years in the pharmaceutical industry, I decided to change course to become professor of SVT. I have to get back to level in biology, and this book of 1,300 pages is really perfect! Text very clear, beautiful patterns, abstracts, summaries, questions to check the knowledge learned .... I really take pleasure in reading it every day. A counselor to work for all lovers of biology, those in universities, or soon spend their CAPES like me. As for beginners, this book should in no way put you off if you have a minimum of crop biology.