Though this is horrific to me, if it's convenience that you're after you could always take a box cutter to the textbooks, cut them into chapters, and maybe have

Though this is horrific to me, if it's convenience that you're after you could always take a box cutter to the textbooks, cut them into chapters, and maybe have them spiral-bound. Alternatively, you could see if there exists a loose-leaf copy of your textbook.