They May have a “U.S. addresses” but Facebook states they’re in Pakistan. They've awards logos on their own website from 2020 (the website didn’t exist till 2024). You will discover bad opinions on copyright about their modifying services. We couldn’t find the featured book on their own homepage on Amazon. https://maplepublishers.com/blog/why-opt-for-self-publishing-is-it-only-for-creative-independence-or-something-more/