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If you want an authentic guide on early Buddhist meditation (Ajahn Brahm and Pa Auk teach meditation practices that are completely different, based on Vism. and late Buddhist redefinitions of jhana), here are two great books:
Thanissaro Bhikkhu's books and articles on dhammatalks.org, especially "With Each and Every Breath" Bhante Henepola Gunaratana Beyond Mindfulness in Plain English, 2010 CE (from wisdom pub). The book is more broadly based on EBT JhΔna. 16 APS is one of the methods he discusses, but does not focus in detail on the 16 steps.
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Observing five precepts is the shortest way to enter the path. Then read the following.
A Study Guide on the First Stage of Awakening
OR
Buddhism Course by Chan Khoon San (take about 12 hours to read and give you a good idea about the teaching)