Just as important as the exams is the interview panel, and this is the book for those who want to deal with both - its purpose is to help you become a professional, for which the exams are but a step on the way - doing the bare minimum to pass them makes you ill-prepared to be a pilot, which is not fair to future passengers and painfully obvious to employers (and interviewers) who certainly expect you to have more than a basic knowledge.
Based on the author's approved EASA ATPL(A) course, it is a reference book that follows the ATPL syllabus, so you can use it before, during and after your exams, for the whole of your career!