If you're looking for #ChristmasGifts then Bloomsbury currently have a sale and for your science-minded friends my #PopSci books are currently cheaper than Amazon!

Fire & Ice is about #SpaceVolcanoes
https://www.bloomsbury.com/uk/fire-and-ice-9781472960368/

and my other book, Catching Stardust, is about #comets and #asteroids
https://www.bloomsbury.com/uk/catching-stardust-9781472944009/#