Q - When doing comparative research for a book proposal, is there a point where a book would be considered "too old" to be listed? Obviously it is best to have the most current, but if the title closest in subject of my book is six or seven years old, should it be listed or should I find something not as similar but more recent?
A - I would list the older book, especially if that book did well in the marketplace. As long as you are sure there has not been a similar book published more recently. An older book with good sales could indicate that the topic is viable and the market is ready for a new book on the topic.