Hey it’s avonsnumberonefan :D do you by chance know if sheriff Darrow books exist in pdf?
Not as far am I'm aware, no. I don't think they ever got an ebook treatment, either, apart from "Badge", which should be available for Kindle according to the author, but perhaps not in all locations around the world.
I did just check the internet archive, though, and did see at least "Badge" and "Word" available to borrow, so someone must have provided a library scan PDF at some point. I think IA accounts are free, so that might be a starting point to give you an impression, at least. You can read them out of order.
Otherwise, your best bet might be trying to chase down second hand copies, if you want the full set, or, depending on your location, try local libraries/inter-library loan, in case somewhere still has them sitting on a shelf somewhere. Or try get in touch with Gillian, as per the post I linked above, to see if that offer of 4 years ago is still valid. The trickiest one to find seems to be "Law", though.