This is book number 18 in the Earthcent Ambassador series.
Book Eighteen of EarthCent Ambassador. Start series with Book One, Date Night on Union Station.
The population of the Conference of Sovereign Human Communities hits a billion, triggering a previously unnoticed clause in the Tunnel Network Treaty. Has the time finally arrived for the Stryx to remove Earth's training wheels and let humanity to stand on its own? The EarthCent ambassador gets a crash course in investing from the alien ambassadors but she's having trouble remembering little things. Dorothy has a new idea to revolutionize the fashion industry while Samuel's career hits a wall.