It's a bit of a tricky brief!
The older one (11) loves Cabin Pressure, John Finnemore, NSTAAF etc (and reads Hunger Games, Lockwood, YA etc) but the younger one (9) still tends to prefer more of a narrated story, and reads stuff like Wimpy Kid, bit of David Baddiel, likes The Week Junior.
Last year they enjoyed the first Skandar and the Unicorns etc but lost interest during the second one. When they were younger they loved silliness like Sir Louis and the Dreadful Damsel. Something like the Phillip Pullman trilogy would be the right sort of fit but the younger one has a bee in his bonnet about not liking it. Or maybe a classic? The elder ones enjoyed things like Treasure Island and Jules Verne. Adventure is probably the right genre generally, but I'm out of ideas 😳
Can anyone think of anything we might all enjoy? (I'll be looking on Audible)