They may have a “U.S. addresses” but Facebook says they’re in Pakistan. They've awards logos on their own website from 2020 (the website didn’t exist until 2024). You will find very poor assessments on copyright with regards to their modifying services. We couldn’t find the showcased book on their homepage https://maplepublishers.com/blog/why-opt-for-self-publishing-is-it-only-for-creative-independence-or-something-more/