My mom got this book for christmas, it's short and I knew a large majority of the information, but it was nice to see it in a book published in 2015. I would definitely recommend it to someone who wants to share kratom with someone.
Kratom: The Truth About Mitragyna Speciosa: https://www.amazon.com/dp/1515191745/ref=cm_sw_r_cp_apa_cKhrAb6TEFQAV