TO WHOM IT MAY CONCERN I'M STUDYING FOR THE OS EXAM THE BOOK I'M USING IS MIKE MYERS A+ PASSPORT DO YOU ALL THINK THAT THIS IS THE ONLY BOOK THAT I NEED TO STUDY FROM BECAUSE IT'S ONLY 6 CHAPTERS IN THAT BOOK FOR OPERATING SYSTEM,WHERE COULD I PURCHASE AN EXCELLENT UP TO DATE TEST TO FURTHER PREPARE