ok truth be told i got my book for nitrox two months before the class was to be taken. so i some how i lost my book during that time and never even cracked it. mean while me and my buddy were both taken the class so we thought we both could study together. well that never hasppen. test day comes i havent even studied a lil bit. but there was a silver lining in this i found my book 5 min befor i went to the dive shop to take the test. so now book in hand test looming above me i took it with out studing and not only did i past but i only missed 2 questions felt pretty damn good but not confident. please read it will be easier on you dont take my path of the darkside. michael