Yoda wrote:

For some reason a book series that disposes of its cast with each new entry sounds very appealing right now 
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Oh I agree. I'm currently reading China Mieville's Bas-Lag 'series' (on the second book,
The Scar), and it's nice to indulge in series with lots and lots of bizarre fantastical world building with the knowledge that the plot is actually
going somewhere and the next book will be about unrelated characters and problems.
Eh. I hope Martin tightens his belt, narrative-wise, for the last two books. I don't mind them each being as long or longer than ADWD, but tons and tons of stuff had better happen.