Because the book is both incredibly popular and long out of print in some editions, many students naturally look for a free PDF. However, there are important facts to consider:

First published in 1941, "The History of the Arabs" has become a classic in the field of Middle Eastern studies. The book covers the major events, figures, and cultural developments that have shaped the Arab world, including:

Philip K. Hitti's History of the Arabs (1937) is a seminal, comprehensive text covering the political, cultural, and ethnic evolution of the Arab world from antiquity to the 16th century. It documents the rise of Islam, the Umayyad and Abbasid caliphates, and the Arab presence in Europe, acting as a foundational resource for Middle Eastern studies. Access a PDF version of the text via the Internet Archive Google Books History of the Arabs - Philip K. Hitti - Google Books

For decades, this book was the starting point for any serious study of Arab history. It has been translated into numerous languages, including Arabic, Persian, Turkish, and Urdu.