Sri Lanka

Anapanasati - Mindfulness of Breathing [Local copy]
Henepola Gunaratana A Critical Analysis of the Jhănas in Theravăda Buddhist Meditation [Local copy]
Ven. Matara Sri Nanarama The Seven Stages of Purification & The Insight Knowledges [Local copy]
Venerable Nyanaponika Thera The Four Sublime States [Local copy]