Surah Al-Baqarah commences with this verse of Allah U : ﴾الٓمٓ﴿

What is the meaning of these letters? There is not another book on this earth which starts with letters in this manner.

These are structural letters, not significant letters. The significant letters signify meanings, such as (فِي, in) which signifies an adverbial meaning, (عَلَى, on) which signifies superiority, (مِنْ, from) which signifies beginning and (إِلَى, to) which signifies ending. However, ﴾الٓمٓ﴿ consists of structural letters that we will not be asked about their meanings. There is not a single book which begins with letters which do not have a meaning.

If the Holy Qur’an had been from the Prophet r or humans and jinns had gathered to author the book, it would have never occurred to any of them to write a book intended for human beings except with words and letters which contain meanings, so that no problems will arise.