Flashing Saber: Three Years in Vietnam Kindle Edition ($0.00) https://www.amazon.com/Flashing-Saber-Three-Years-Vietnam-ebook/dp/B00UTKELYC/ref=sr_1_20?s=digital-text&ie=UTF8&qid=1512594440&sr=1-20&refinements=p_36%3A0-0
https://www.amazon.com/R.%20C.%20Sproul/e/B000APQIVU/ref=la_B000APQIVU_st?fst=as%3Aoff&rh=n%3A283155%2Cp_82%3AB000APQIVU%2Cp_n_feature_browse-bin%3A618073011&qid=1512594902&bbn=283155&sort=price-asc-rank