Don't even have money for textbooks?

Don't lose hope. I know a lot of individuals who have the same situation like yours even worst! You're lucky enough to go to school. Just keep holding on. Why don't you approach your mentor/ teacher about it? but i suggest do it privately as they might not grant the help you need. Or approach a friend, borrow the book you need and have them photo copied? I'm sure you won't need every pages of it. If it doesn't work still, just manually copy it by borrowing it and just copy the important details? or listen carefully to your mentors as they give more important details than textbook does! Goodluck on your studies and god bless you! :)