Complex sentence: A Story of The Expanse was released as an eBook October 2011 and 69-page novella, followed by "Gods of Risk", which was released as an eBook on September 2012.
Split into simpler sentences: A Story of The Expanse was released as an eBook in October 2011. A 69-page novella, "Gods of Risk" followed, and was released as an eBook on September 2012.