All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
There is no objection in reading biographies of non-Muslims to derive benefit from their practical experiences. In addition, it is not forbidden to read them merely because they are non-Muslims, or that there are some of the prohibited texts in their biographies and the like.
Allah knows best.