The books by Punjab Curriculum and Textbook board are given in pdf for class Nursery to class 12. I have given the table below where you can download the pdf books of that class by clicking the link.
These are free books of science, Urdu, English, Maths, Islamiat, Social Study or Muasharto Aloom, Pak Study or Mutalia Pakistan, Punjabi, Physics, Chemistry, Biology, Computer, Drawing, History, Geography, Civics, Education, Arabic, Agriculture, and many other books for all students and all classes.