O hai again, PF. So...for the next semester, which starts roughly in January, I'll be taking calculus. However, I will meet again with the toughest teacher in my school. So, it will be harder for me to actually understand calculus. And so, I send this distress call: I want to start studying a bit already. I am in the search of an easy-to-read book, easy, or low leveled, as you want to call it. Something easy to digest. So...what book do you recommend to this high school student?