The Guru Granth Sahib or Adi Sri Guru Granth Sahib is final guru of the Sikhs. The Guru Granth Sahib is Written in the Gurmukhi script, Punjabi with Braj, Punjabi, Khariboli (Hindi), Sanskrit, regional dialects and Persian. Compiled and composed during the period of Sikh Gurus (from 1469 to 1708). It is the Holy Scripture and consists of 1430 pages/angs(parts) and has 5864 verses.
It is a collection of hymns or shabad. Guru Granth Sahib contains the compositions of Fifteen Bhagats Beni, Farid, Dhanna, Jaidev, Kabirhymns, Namdev, Parmanand, Pipa, Bhikhan-Ramanand, Ravidas-, Sadhna, Sain, Surdas, Trilochan. Eleven bards (bhats) Kalashar, Jalap, Kirat, Bhikha, Sal, Mathura, Bal, Bhal, Nal, Gayand and Harbans who came to the court of Guru Arjan Dev Ji in 1580. Including some hymns from Baba Mardana ji, Baba Sunder ji, Sata Doom, and Rai Balwand. The majority of bani in the Guru Granth Sahib contains the hymns of the Gurus: Guru Nanak Dev Ji-974 hymns, Guru Angad Dev Ji-62, Guru Amar Das Ji-907, Guru Ram Das Ji-679, Guru Arjan Dev Ji -2218, Guru Tegh Bahadur Ji-115, Guru Gobind Singh-1.
The Guru Granth Sahib starts with Guru Nanak's composition, Guru Nanak Ji wrote Jap Ji also called Guru Mantar. It consist of 40 sloks about nine pages. Jap Ji is followed by Sodar Rehras, another composition by Guru Nanak, although later on Guru Ram Das made additions to it and Guru Arjan Dev. Kirtan Sohila follows Sodar (It was also composed by Guru Nanak but has additions by Guru Ram Das and Arjan Dev) and occupies a little over one page. The next portion of the Granth is divided into thirty-one sections each according to a particular raga (1154 pages). There are 31 musical measures (ragas) in the Guru Granth Sahib, ragas are composed to suit various moods like some to joy, others to grief, morning and evening.
The first parkas of Guru Granth Sahib (opening ceremony) were performed in the Golden Temple (Harmandir Sahib) newly- built by Guru Arjan on August 30, 1604. A number of copies of Granth Sahib were transcribed by hand by Baba Deep Singh ji at Damdama Sahib. Guru Gobind Singh also made it clear that, after him, the Guru-eternal for Sikhs would be their holy scripture, Guru Granth Sahib Ji