My best-selling book, Doubling Groups 2.0 is free today in the Kindle version. https://www.amazon.com/Doubling-Groups-2-0-generation-hospitality-ebook/dp/B00S6JZBGK/ref=as_sl_pc_qf_sp_asin_til?tag=2020vision-20&linkCode=w00&linkId=ENE6QYLGUQPHO5RM&creativeASIN=B00S6JZBGK