Why a math book for biologists, created by students for students? We know what math is truly needed for biology exams and the bachelor's thesis. We have studied biology or math/physics ourselves and have experienced firsthand how incredibly popular math is among biologists. Besides a natural aversion, it often stems from the fact that teaching is rarely application-oriented. We have made an effort to include only what a biologist really needs in one book and to consistently leave out everything else. There are constant references to publications from modern biosciences. Such relevant examples will surely be helpful to you. And the best part: the book is guaranteed to be free of rabbits! We do not deal with rabbit populations but with current examples such as signaling pathways. The content of the book covers the material from the first math lectures for biologists at most universities.