Depends, if you just wrote books without bothering to REALLY study how fiction works, anything is possible. Writing well is stupid hard, and just writing more

Depends, if you just wrote books without bothering to REALLY study how fiction works, anything is possible. Writing well is stupid hard, and just writing more won't necessarily teach you how. Though if one's willing to put in the time to write 10 books one would hope the same person could put in the other effort studying the craft side of writing... Not impossible though.