This book accompanies us well along the different stages of the competition. As against the logic corrected QCM are not commented. We are given the correct answer without explanation, which does not improve in logic. Worse still, some gross errors in mathematical formulas. He obviously missed a serious Print replay. This can be fatal for a contest ... In conclusion, interesting book for the exact content of the competition but check the mathematical formulas program with other media not to be misled.