A book on Dua by Hazrat Maulana Yunus Patel Saheb can be dowloaded from here. Following is the content of the book:

• The Dua of the Auliya Allah
• Duas of Hazrat Maulana
• The acceptance of Dua
• Insincerity
• non-acceptance
• The names of Allah Taala
• The 99 names of Allah Taala
• Durood Sharif
• Sincere taubah
• Immediate Wilayat
• Some etiquettes of Duas
• At the Airport