He is asking about a book about the ninety-nine names of Allaah
Question

                I would like to know the fatwa on a book called "the 99 beautiful names of allah" written by moulana mohammed idnees meerthi.
Praise be to Allah.
    We do not know of this book and we have not read it so we 
    cannot pass any comment on it. But the scholars, both classical and 
    contemporary, have studied the ninety-nine names of Allaah that the Prophet 
     (peace and blessings of Allaah be upon him) referred to when he said: 
    “Allaah has ninety-nine names, one hundred less one; whoever memorizes them 
    will enter Paradise.” Narrated by al-Bukhaari (2736) and Muslim (2677). 

    Many scholars have striven to derive the names of Allaah from 
    the Qur’aan and Sunnah, and they have laid out guidelines by means of which 
    they found out the names of Allaah, may He be exalted. 

    We should point out two things here: 

    1 – The scholars have defined these names of the basis of 
    what each one of them thought was appropriate, and we cannot be certain that 
    these are what the Messenger  (peace and blessings of Allaah be upon 
    him) meant. 

    2 – The hadeeth that is narrated by al-Tirmidhi in which 
    these names are listed is da’eef (weak) according to the consensus of the 
    scholars of hadeeth. You will find a more detailed discussion of this issue 
    and others in the answer to question no. 
    72318. 

    And Allaah knows best.