Hi so I think you are under a time crunch in which case I would highly suggest getting the new collins material. I just took the pcat this September and thank god I didn't take it in July like my original plan because they changed it quite a bit from what it used to be. They added a lot of passages with weird looking structures and weird, complex questions. They also added a microbiology section. The old collins doesn't have this stuff. I am trying to get rid of my materials that I used to study with (i used 2016-2017 collins) which landed me a 98 on the PCAT. If you need to buy I can sell. I can also help you with general tips and advice for the exam. Message me if interested.