Create an account on www.dropbox.com and install it on your Windows laptop as well as on your iPad (Dropbox from the App Store). On your laptop, this will create a Dropbox folder in which you can save the documents that you wish to have on your iPad.
On the iPad these documents will show up in the Dropbox app and you should be able to open and save them using Microsoft Office there, if they are in .docx or .doc format. Changes that you make on the iPad will be synced to your Windows laptop automatically. There you can open them with Papyrus Author and transfer the changes to your .pap documents or projects.
You can also work directly with .docx and .doc files using Papyrus Author but keep in mind that these file formats do not support any of Papyrus’ special features such as character databases or thinkboards. There might even be differences in the page layout, depending on how complex the documents are. Still it’s a good way of exchanging documents automatically without having to email them back and forth.
Instead of Dropbox, you could also use Apple’s iCloud Drive. It’s already installed on the iPad and only requires separate installation on the Windows laptop: Download iCloud for Windows - Apple Support This will create an “iCloud Drive” folder on the laptop which can be used in the same way as the Dropbox folder. On the iPad, the Files app provides access to the iCloud Drive documents.