iPhone User Guide

How do I download the iPhone User Guide to my Windows laptop? In PDF format, in case I want to print some of it out? Should be simple, but the link provided with the iPhone refers me to Apple Books and going to Apple Books in Windows (Chrome browser) does not give me any option to download books. BTW, as a new iPhone owner, I find the Apple World very puzzling and infuriating in some ways. Hope it gets better or I am returning the iPhone and going back to Android. THanks for any help.