In a famous hadith recorded in Sahih al-Bukhari, the Prophet (PBUH) ranked the best women of all time:
: If you're looking for a PDF version of Siti Khadijah's biography or manaqib (a form of Islamic biography), I can suggest some possible sources: manaqib siti khadijah pdf
If you are looking for detailed PDFs to download, you can search for the following titles in online Islamic libraries (such as Sunnah.com, Archive.org, or Waqfeya.com): In a famous hadith recorded in Sahih al-Bukhari,