I'm not too sure what you mean by "comprehensive collection of writings about all faiths". The sacred writings for Baha'is are those of Baha'u'llah as the Quran is for Muslims. Abdu'l-Baha became the leader of the Baha'i Faith after Baha'u'llah's passing May 1892 as instructed by Baha'u'llah in HIs will and Testament. Abdu'l-Baha was the authorised interpreter of Baha'u'llah's Revelation as was Shoghi Effendi after him. The Universal House of Justice became the head of the Baha'i Faith in 1963 as per Adbu'l-Baha's will. The Bab was the forerunner to Baha'u'llah as John the Baptist was to Baha'u'llah. So the writings of the Bab and Baha'u'llah make up the sacred writings of our Faith, but the writings and elucidations of Abdu'l-Baha, Shoghi Effendi and the Universal House of Justice are all important.
As the Bab and Baha'u'llah had been Muslims prior to being bearers of independant Revelations from God, there is much Islamic context and commentary. Abdu'l-Baha travelled to the West and so provided extensive commentary of Christian themes. Beyond that what the writings of the Central figures have to say about Hinduism is limited.
The book by Moojen Momen is one Baha'i's attempt to make a comparison between the Baha'i Faith and Hinduism.
Hinduism and the Bahá'í Faith
While scholarship and learning are very important in the Baha'i Faith, scholars have no more status or authority then anyone else in the community.