To anyone from Canada or anywhere that's not in the sales range, you can get book 2 (the writing prompts) kindle version for $1.32CAD or $0.00 (kindle unlimited).
Wait... if that's book 2, then what's this? https://www.amazon.com/gp/product/B08B1JSHNZ
If you're looking for random generated stuff, then Chaotic Shiny and DonJon are good places to start. If you're looking for questions about your world, I have free 101 Worldbuilding Prompts book up on Amazon.
PSA - This is the first book in a series, and the second book is currently free on Kindle.
So after you buy this, go get the second volume!