by Are Holen & Torbjørn Hobbel
This book contains useful information for the practice of long meditations at Acem retreats. Long meditations yield insights into meditative processes and enhance the quality of everyday meditations.
At regular retreats, daily meditation time is gradually increased and may reach 3–4 hours, while daily meditation periods at deepening retreats are 5–6 hours or more. Some people find that 3–4 hours is enough, while others are interested in longer meditations. This book has something to offer both groups.
You may order the book from Acem India.