As requested, here is my short bio:

Liborius Olaf Lumma, Dr. theol., Roman Catholic. Assistant professor for Liturgical Studies at University of Innsbruck (Austria). Member of the Ecumenical Commission of the Austrian Catholic Bishops‘ Conference and the Austrian Council of Churches, board member of the German section of the International Association for Studies of Gregorian Chant, chairman of the Innsbruck Research Center “Synagogue and Churches.”

Major fields of research: Liturgy of the Hours, Gregorian Chant, Ecumenical Theology.
Recent books: Für-Bitten. Verstehen – verfassen – vortragen. Innsbruck/Vienna: Tyrolia (2018). Liturgie im Rhythmus des Tages. Eine kurze Einführung in Geschichte und Praxis des Stundengebets. Regensburg: Friedrich Pustet (revised edition 2017).