It's the classic story form. All staying equal, or proving equal, or being equal, this will all continue, and the next time around, we'll move on to see what happened to Harry after he dove in the river, or who his friend John really was, and so on.
I don't really think in terms of making something that is going to be bought everywhere, because I don't read those things. My writing is a process in which I try my best to make good sentences and a sequence of events that is compelling and believable.
And I don't want to begin something, I don't want to write that first sentence until all the important connections in the novel are known to me. As if the story has already taken place, and it's my responsibility to put it in the right order to tell it to you.
Fiction came quite a while later. I began with short stories and fiction for children.
'Pulp Fiction' blew my mind; beforehand, I'd watch films and there was a beginning, middle and an end, and that's it. There is in that film, too, but it's out of sequence.
Readers and viewers will differ about what's totally standalone, what's totally serially dependent, and what's merely enriched by reading/viewing in a particular order.
'Monkeys' is made up of nine short stories that tell an overall story. 'Folly' is a series of vignettes all put together to tell a larger story. In 'Lust and Other Stories,' there are nine stories - three, three, three; the beginnings of love, the middles, and the afters.
The end of 'Hollow City' left the peculiar children in a very precarious spot, and that's just where 'Library of Souls' begins.
To put it crudely, 'The Act of Killing' would blast open the space for the more delicate film, 'The Look of Silence,' to do its work.