This step and the next one are probably going to take you the most time. But when done, you’ll be in great shape to produce this book. Here you are going to write some chapters for your book. You may have already done this, or you may do this first and then write the rest of your proposal. The order in which you do these things doesn’t matter. You just need them all to put together a complete package for your proposal.
Check the writer’s guidelines for each publisher and agent you are submitting to and send each one just what they want.
Some publishers want three sample chapters, others want two, some only want one.
I recommend you go ahead and write the first three chapters. Then you’re in good shape to provide whatever they want.
FICTION WRITERS: Send the number of chapters the writer’s guidelines state, but don’t send the whole manuscript until they request it.