Recommended interview (by C. J. Busby) with Frnaces Hardinge
I always plot out my books before I write them. For my first book I even had a chapter by chapter outline. I haven’t gone into quite that much detail in plans for my later books, but I always map out the main incidents, and know what the ending will be.
However, there’s always some room for making things up on the fly. A book should be a journey of discovery for the writer as well as the reader, otherwise the writing process can become dull and leaden. My stories surprise me. Characters develop in unexpected ways. Just now and then, I change my mind about my plot structure halfway through writing the book. It’s still useful to have that first plan, though, even if I decide to deviate from it. I need that trellis, even if I can’t full predict how my story-vine will grow.