They may have a “U.S. addresses” but Facebook says they’re in Pakistan. They've awards logos on their Site from 2020 (the web site didn’t exist until finally 2024). You will find bad opinions on copyright with regards to their enhancing services. We couldn’t locate the highlighted book on their homepage https://maplepublishers.com/blog/how-to-start-your-career-as-a-self-publishing-author-with-maple-publishing/