Uposatha Sila:The Eight-Precept Observance, by Ñanavara Thera (Somdet Phra Buddhaghosacariya) (1992; 53k/17pp.)
Questions and answers concerning the observance of Uposatha days — special days for laypeople and monastics alike that follow a lunar calendar and call for renewed commitment to Dhamma practice. [See also this year's calendar of Uposatha days.]