Bitexbook is an exchange launched by StreamCapital Group Ltd, a Forex company based in St. Vincent and Grenadines. The exchange was launched in March 2018 and on the 31st of May 2019, it announced the addition of XRP on its platform.
According to the announcement, XRP is now available to trade with pairs to the Russian ruble (RUB), United States dollar (USD), Bitcoin (BTC), Ethereum (ETH), Tether (USDT) and the BitFlip debt token (XRPBF).
At the same time, Bitexbook seems to have added an XRP market tab on its platform, indicating that perhaps more XRP pairs will be added soon. Moreover, the ETH pair seems to be missing, for now.
It will be interesting to see if Bitexbook adds more XRP based pairs in the future.
Reminder: Always DYOR before using any exchange or service.