i think im on the right track, i am still in chapter 43 but planning to purchase all the chapters soon, so i had to ask if theres like book 1 2 3 as i understand all the books is packed in this one right?

hi all FTR here, i want to know since ive been reading some confusing ones as if theres more than one book? if so where to find them? i am planning to recharge just to read all the chapters ,also is this book complete? thank you for the answers!

FTR what book is this? and where to find book 3 or the others?