How to specify documentclass option for a 5 inch * 7 inch book?

Question

I wanted to use Latex to make a book. But not in A4 size. I want it in 5 inch * 7 inch. The standard size for a novel.

In \documentclass[a4paper]{book}, is there anything that can replace 'a4paper' which will help me to achieve this? Or will I have to manually set all the margins and spaces?

Answer 1

\documentclass{book}
    
\usepackage[paperwidth=5in,paperheight=7in]{geometry}

...

other margins can also be set by that package. See documentation.