I’m pondering creating a “boxed set” of the ebooks for The Last P.I. series; it would sell for less than the three books sold individually.The mechanism is fairly straightforward; the only real extra work (and expense) is to create a new cover. There’s lots of this going on nowadays. My publisher says that it would make the series more attractive to Bookbub, which is the main advertising channel for ebooks nowadays. One more way to get the word out.
Let me know what you think!