Here's links on Amazon to the Method in Two books by Sagreras:

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Books 1-3: https://www.amazon.com/Julio-Sagreras-Guitar-Lessons-Book-ebook/dp/B00WYNM8C4/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=1562105162&sr=8-2

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Books 4-6: https://www.amazon.com/Julio-Sagreras-Guitar-Lessons-Books-ebook/dp/B019EHCLPG/ref=sr_1_4?keywords=julio+sagreras&qid=1562105183&s=gateway&sr=8-4

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Hope you all check it out if not for yourself but for great material for your students, I also look forward to hearing some of your interpretations from people who participate!