Hisn-ul-Muslim - Invocations from the Qur'an & Sunnah. (aka 'Citadel of the Believer' or Fortress of Muslim)
This is a very wonderful booklet which consists of numerous authentic Dua's (supplications) for a Muslim to supplicate on a daily basis and on special occasions.
Author's Note... This book is an abridgment of my earlier work entitled, Adh-Dhikr wad-Du'a wal-'llaj bir-Ruqyah mina'-Kitab was-Sunnah. I have chosen only the section on words of remembrance for this abridgment in order to make it small and easily portable. In order to achieve this, I have mentioned only the text of the words of remembrance instead of the entire Hadith. I also restricted myself to mentioning only one or two references from the original book for each Hadith. People who would like to know about the Companion who related a particular Hadith, or further information about where it is recorded, should refer to the original work (mentioned above).
Said bin Ali bin Wahaf Al-Qahtani, Safar,1409