Complex sentence: Once in Überwald Vimes finds his relationships with dwarfs, vampires and werewolves very different from the ones he experiences back home and also finds the'Scone of Stone' (a large piece of dwarf bread the Low King must be crowned on) has been stolen.
Split into simpler sentences: Once in Überwald Vimes finds his relationships with dwarfs, vampires and werewolves very different from the ones he experiences back home. He also finds the'Scone of Stone' (a large piece of dwarf bread the Low King must be crowned on) has been stolen.