If you truly cannot afford any version, combine (free) with Atkins’ YouTube lectures (many are available). The most important thing is to engage with the material—whether on paper, a legal PDF, or a library loan. Chemistry is a science of clarity, and Peter Atkins provides that clarity. Now go study, but do it the right way. Need more chemistry resources? Check your university’s e-library catalogue or visit the official PWN website for e-book options. Happy studying!