@David7366 The instructions Yadira linked can help you create a Guidebook within a listing, if you're in the process of creating one. Based on your profile, it appears that you've only just signed up with Airbnb today and don't have a listing yet. If that's the case, I'd recommend putting much more time and effort into uploading good quality photos, writing thorough descriptions and rules, and learning all of the calendar settings.
The Guidebook was a cool idea, but the overwhelming majority of guests don't notice or pay the slightest bit of attention to it, so it's actually a waste of time compared to those other details. What does impress guests is the more old-school approach: a nicely printed welcome book that includes these helpful local tips alongside the need-to-know stuff like WiFi password and other instructions.