Abu Huraira reported that the Messenger of Allah said, "Allah has ninety-nine names, one hundred less one. Whoever ahsaha will enter Paradise. (Recorded by al-Bukhari and Muslim)

It should be noted that the hadith states that Allah has ninety-nine names, one hundred less one, is not meant to be all inclusive. That is, it does not mean that Allah has ninety-nine and only ninety-nine names. Indeed, in going through the Quran and authentic hadith of the Prophet (peace be upon him) many scholars have been able to discover more than ninety-nine names of Allah. Furthermore, many scholars have concluded that Allah has an infinite number of names.

 The Prophet (peace be upon him) made the following supplication:

 '[O Allah], I ask you of you by every name that You have named yourself or that You have revealed in Your book or that You have taught any of Your creation or that You have kept hidden, in the unseen knowledge, with Yourself.' (Recorded by Ahmad, sahih.)

Note:

Many scholars hold that the  Remembrance of Allah  is a powerful tool to bring back the Divine consciousness inside us. The remembrance of the Divine through His qualities is recommended and practiced as a spiritual exercise to enable inner transformation. It also holds the secret key to blissful state.

Some may not necessarily agree with the recommendations of the dhikr in this booklet,