Notices player

I started study this book in view of the preparation of a contest, and he does not take me long to sight me that of trenning type questions QCM, as well as explanations and answers were strewn d ' drafting errors.
Some examples: page 231 "(1ha) = 1hm² = 108cm²"; p. 241 "1m² = 104cm²"; p. 134 "Salvador Dali, 1904-1924"
Or sometimes it lack downright a part of the question, or he are no answer to the question.
Of all the 567 pages that make up the book, I could identified ten errors of all types. One might expect that the authors could at least read what they write.
However, this book gives good advice and many MCQ, pity about so many mistakes.