Her brothers, who were in a position to know, all called that book 'the only textbook a university-bound unicorn would ever need,' and she’d even had some exposure to it beforehoof. Back when she was too young to even know what a good party was, let alone sneak out to get blind drunk at one, she did used to -- ‘ugh’ -- hang out with her brothers. Lupin, the oldest, liked to give nightly 'lectures' from 'De Magia Unicornis'; picking a section and then explaining the basics. He wasn't in university at that point, but he'd practically slept with the tome ever since their mom had scraped together the bits to buy it for his 14th birthday. Given how familiar the sections felt to her now, a decade later, he must have done a good job.