Final answer:
You can find a PDF of the myWorld Interactive world history book at OpenStax.org for free, which provides various educational materials, including world history textbooks in PDF format that can be used, adapted, and reused.
Step-by-step explanation:
If you're looking for a PDF of the myWorld Interactive world history book, you have several options. However, one reliable resource for accessing free world history textbooks, including in PDF format, is OpenStax.org. OpenStax provides free and flexible resources for world history that you can access in web view or PDF. Their textbooks are available for anyone to use, adapt, and reuse according to their educational needs.
If you choose to use or redistribute parts of these textbooks, please remember to keep the correct attribution intact as required by OpenStax. For your world history studies, you could also explore other educational resources like the World History Encyclopedia, the Digital Public Library of America, DocsTeach, the Internet History Sourcebooks Project, and the Library of Congress World Digital Library Collection, which offer a wealth of primary sources and historical documents.