We have an incomplete draft of the whitepaper, with the full version it will be released by the end of the year (2019). The link to the first draft in PDF is here: https://zoobc.com/ZooBC%20Whitepaper%20Draft%20-%20V0.1.pdf
The live edit of the next draft is in Google Docs, and you can contribute with comments and edit suggestions here: https://docs.google.com/document/d/1RHbDHHH0JlAfU8bdgfawbnvlm-Ng_Tq-VA7P-n1p_80