How much of my own writing does Author voice need, and what kind?

In version 1.9.18 and later, a sample needs at least 40 words, and the bar under your samples fills up to 600 words, from where the voice holds well. More samples of different kinds (a blog post, an email, a chapter) make it richer. Each profile holds up to 40 samples. Mark with the star the samples that sound most like you: they are read first and quoted first. The four numbers on the card (words in your average sentence, how many of your sentences are very short, how many are questions, sentences in your usual paragraph) are measured on your own pages, and BookyAI is told to match them. If you add samples later, the card says how many are "not learned yet": press "Learn again". Your own corrections are kept when you learn again.