Third Oz novel by Plumly Thompson; seventeenth whole.
Three subplots collide:
Mustafa, king of Mudge, a kingdom hidden away in Winkie country, collects lions. He has nine thousand, nine hundred ninety-nine and a half (don't ask) lions living in a large enclosure surrounding his kingdom, effectively discouraging visitors. But he wants more.
In the United States, at a circus, Notta Bit More -- a clown -- attempts a magic trick, and quite surprises himself when an incantation that just comes into his head causes a little orphan boy to disappear. He tries the incantation again to see if he can bring the boy back, but he, too, disappears, and he and the boy (named Bob Downs, whose name Notta changes to Bob Up) find themselves -- where else? -- in Mudge. Mustafa orders them to fetch him a lion, and not just any lion, but the Cowardly Lion of Oz, and uses magic to ensure that they dare not disobey him.
And in the Emerald City, the Cowardly Lion himself is distraught at being such a coward and decides that, if he were to eat a brave person, he might, so to speak, catch bravery; so he sort of sneaks out of the Citiy to go do it.
Hijinks, of course, ensue, as well as puns and wordplay that might make Baum proud. In the end, the Cowardly Lion doesn't eat anyone (of course), meets up with Notta and Bob, and, together, have more adventures until such time as bunches of Ozites descend on Mudge to set things straight, and a happy ending is had by all, even Mustafa.
Well, all but the nine thousand nine hundred and ninety-nine lions, who have a decidedly unhappy ending, but nobody seems to mind about them. And the half is reunited with its other half, so that's happy too.
It would take a better reviewer than I to derive some kind of meaning from these books; but that's okay, because they were written to amuse children, and -- as a superannuated child myself -- I approve.