I'm trying to translate a manga I picked up in Japan a couple of years ago on a high school trip (Gokinjou Monogatari by Yazawa Ai) to learn kanji better. I've sort of stumbled my way through the cover and most of the inside book flap, but I'm stuck on this:

全4券

It's beside a couple of the listings of her other manga. I can make out that it says something like "4 volumes in all" but I'm not sure, and I can't google it because it's not a word or even a sentance.