The Book of Discipline (1966)
Readings by Ajahn Ñāṇiko: [Mindfulness of breathing]
Right Mindfulness pp. 93-96.
Vinaya: Book of the Discipline Part 1 p. 116-121, Pārājikā 3 origin story.
Sutta: AN 9.36: Jhāna.
Sutta: SN 54.8: Simile of the lamp.