What is the fine-grained topic of the following text: I first pitched the idea for what would become Abaddon Books' Steampunk science fantasy series, when Jonathan Oliver - now Editor-in-Chief of Abaddon, Solaris and Ravenstone Books - put out the call for authors, but the kernel of the idea had been knocking around in my mind for years before that. Only return the topic.
Creation of Abaddon Books' Steampunk science fantasy series