Publishers probably don't get a lot of revenue from pocketbook-sized novels so they don't produce them anymore.

Those sizes are probably reserved for the best of the bestsellers, they know it will still sell.

I would love to have some that I can leave in the car so that there's something to read in case I forgot to bring my Kindle with me.

I only have one paperback of that size, and it was gift from work, Into the Water by Paula Hawkins, which is not my type.

I have a similar-sized hardback, The Race Around the World, but it's not a novel. It's a Lakeside Classics book that is given to R.R. Donnelley employees only.