I'm not sure which light novel you're referring to. However, if you are looking for a light novel similar to Sword Dance of the Elven Envoy, I can tell you some common works. The tenth volume of a light novel would usually be released within three months of publication to ensure that readers would receive the new chapter in time. So if you are waiting for the tenth volume of the light novel, you may have to wait until March to receive the official announcement. However, you should also be able to find the latest publishing information on the official website of light novels or online bookstores to help you determine if you need to wait.