My advice for u.
(as I suppose I will take lvl 1 again in december).
Dont bother with the textbooks, dont learn anything in fact. Just do as many mock exams and practice questions as you can. This test does not test real knowledge, only how much you have memorized.
I would advise you to spent 3 months with the PassPro testbank and mock exams, thats what I plan to do if I have to retake lvl 1 , and 2 and 3. No more reading for me. This is pure bull.
and besides, dedicating 300 hrs per level is a waste of time since the best way to pass this shite is to memorize questions.
300 hrs = 300 missed out working hours, that is 10 working weeks, 2 monthy salarys.
2 monthly salarys means a huge vacacation around the world.
IS IT WORTH IT