The Servant of God Father Patapios Emilianov was a Russian Orthodox presbyter in Nizhnaja Bogdanovka. In an effort to bring Popovotsy (priested) Old Believers into communion with the Russian Orthodox Church, the latter agreed that those who did so would be permitted to retain their historic praxis and unique spirituality. These were known as Edinovertsie or Uniate Russian Orthodox and Father Patapios' parish was such a former Popovotsy community.
In 1918, Father Patapios sought to enter communion with the Catholic Church. He was received, in orders, by Metropolitan Andrij and accompanied by his parishioners, numbering 852 adults. During the early '30s, Father Patapios, together with many Russian Catholic and Orthodox clergy and hierarchs, was arrested and transported to the gulags. On 14 August 1936, he was martyred in odium fidei
at Nadvojtsy in the Republic of Karelia.
There are no books or webpages specifically devoted to him, as far as I know. The only photo of which I'm aware is copied on the Directory at https://www.byzcath.org/index.php/find-a-parish-mainmenu-111?sid=524:by_church