* Horowitz has expressed his desire to continue the series: He has repeatedly stated his fondness for Alex Rider and the world he created. In interviews, he often hints at potential future storylines and his excitement about exploring new aspects of the character.
* The popularity of the series: The books remain incredibly popular, and the recent success of the television adaptation has undoubtedly rekindled interest in the series.
* Horowitz's writing schedule: Horowitz is a prolific writer, and his schedule allows for him to write multiple books each year.
Therefore, while nothing has been officially confirmed, it is highly likely that Anthony Horowitz will write more Alex Rider books in the future.
However, don't expect any immediate news. Horowitz is currently busy with other projects, and any new Alex Rider book will likely be a few years away.
Keep an eye out for any updates from Anthony Horowitz or his publisher!