You can read it free here: https://zapier.com/learn/the-ultimate-guide-to-remote-workin...
Can also get it on Amazon free here: https://www.amazon.com/Ultimate-Guide-Remote-Work-Manage-ebo...
No email required.
How about adding a direct link to the PDF (or any other single document that exists) on https://zapier.com/learn/the-ultimate-guide-to-remote-workin...?
It's almost as if their sole purpose isn't to give you free stuff that they took the time to produce. I would think most people on this forum would be understanding and respectful of that...
The only thing I take away from these "sign up to get our ebook" bits is that you don't have enough confidence in your material to believe I'd subscribe after reading it.