Rachel Ní Bhraonáin reginites her award-winning dance-theatre take on the mosh and the moshers at Dublin Dance Festival; conductor Gabriel Crouch dives the fathomless depths of Jóhann Jóhannsson's enigmatic music-out-of-time choral work, Drone Mass; and Paddy Woodworth's latest book for the Naturalist's Bookshelf.