Planning to sign up for straighterline's macroecon. Should I buy the book?

[JBjunior]

I loathe and despise textbook companies. 17 editions? Is that one every semester?

You'll need the book or be very good with google. I didn't buy the book but used other obscure resources that I won't disclose. I've said this in other threads but just know that Straighterline didn't build their program from scratch and many other schools have used that same book and program for the same end results. Buy the book and use the website that Geezer has linked to in other threads and is probably listed in the book.