Do you usually wait to write another book between chapters and stories? I recently completely rewrote a science fiction now I sort of completed a few months ago, itself a combination of two novelettes that weren't really complete on their own. Now I just need professional line editing, and I'm set.
I wrote between chapters by finishing a couple of middle grade novels, and a few middle grade shorts.
Aside: Still Marveling at the cover I had help on, which I devoted a special thanks to.