Ignition of the Black Sun?

So im new to rituals and rites and i have a question.
So I was wondering about the rite in chapter two The Igintion Of The Black Sun in Kurtis Jospeh’s book of Black Magick of Ahriman the one you can intergrate sungazing with. Is it possible to read from the book in the beginning while doing this rite? And memorize it over time?