Use the book to shrink your breasts

Already knowing that the large, ornate book can effect your body, you walk back over to the pile of your clothes on the ground, and pick the book up from where you set it aside. Again flipping through the pages, you find the page of the previous incantation you tested, and notice something odd. Your hair now is a deep shade of red, the exact color of the hair in the picture on the left. You realize the book must read from right to left, and similarly all of the spells are simply just English words in reverse- this one was "raih eht retla", or literally "alter the hair."

Searching through the book, you find the page you're looking for- one with two women of different breast sizes, where the one on the left has the smaller bust size. The incantation confirms your suspicion, and then some- it reads "dnim eht hcirne, tsaerb eht knirhs", or "shrink the breast, enrich the mind."

Surprised to find that you'd get knowledge as part of the deal, you're quick to perform the incantation. Again, it's initially difficult, but the words start to come easier and easier as it gets further into the sentence, your mouth seemingly working on its own to pronounce the foreign syllables. "dnim eht hcirne, tsaerb eht knirhs"

It takes less than a second, but you feel as if a weight is lifted, both from your chest and from your mind. At the same time, your chest shrinks, your breasts vanishing into your chest until only small nubs remain.