I noticed that some books written in TeX have a smaller page size than the usual articles. Specifically, I'm looking at the Language Science Press template, which seems to use a smaller page size. My question is, how can I obtain the same results? I'm pretty new to TeX so I'm not sure how to proceed. I'm using TexMaker, if that can help.
Also, since I'm in the process of writing a linguistics book, I was wondering what the best class for it would be, or how I can write my own custom class for tables and titles. Finally, will I be allowed to sell this book if I use a pre-existing class file once I'm done with it? Thank you.