The Crystal Cave is one of those books I absolutely adored when I was about twelve, but now cannot remember a single thing about. I know I reread it a lot, and The Hollow Hills too, though I think I didn't enjoy the third one so much.

The everyday objects book sounds amazing, please share any interesting pigeon facts! I did a bit of reading websites about urban pigeons for writing Squadron Leader Pigeon, and they're surprisingly lovely little animals really.