It'll be available on the bookstore website: https://campusstore.mcmaster. ca/cg...urse material
Generally people suggest you don't buy til after your first class. The textbooks cost a fortune and some profs will tell you certain books are only recommended, not required.
Then again, if you know what the textbooks are ahead of time, you can sometimes get them on Amazon for cheaper in July. Just don't buy current editions from Amazon after that. You can't, actually, they're usually already gone, and the ones left are selling for 2x the bookstore price by September.
If you want to save money, you can buy cheaper older editions of some books on Amazon and get away with it. The mass-produced American undergrad textbooks used by sessional lecturers in first and second year classes generally don't change from one edition to the next, except for a few info boxes on "new material" that are entirely useless which you won't be tested on because the lecturer doesn't even know anything that's happened in the world since 1980.
Also look for "world editions" or "global editions" on Amazon: they're nearly exact copies of the US version of the book, but sell for 1/3 the price because they're printed in Malaysia for students in countries who would never spring $200 for a garbage American first-year textbook.
You'll also find that most kids don't even bother reading the books, which is sad, but then again it's the professors' fault for structuring the classes so easy that all you have to do for a 70 is show up for 2 or 3 multiple choice tests and fake them based on what you've read on the internet.