While Mr Stroud seems to have moved on to other projects, he has repeatedly hinted that he might revisit Bartimaeus in the future. What would you like to see in any hypothetical future books?
Lore? Closure for certain events/characters? Some questions you'd like to see answered? Past adventures? Future adventures? New characters? Old characters? More about higher spirits? More about different kinds of summoning? More Faquarl? More Kitty? More [insert background character you're really attached to]?

Sent from my HRY-LX1 using Tapatalk

More worldbuilding lore in general please and thank you! Anything to with the history of past empires, of how spirit summoning works, of the Other Place and how it's connected to the mundane world. Anything from Bart's life after Nathaniel, of Kitty's travels, or Piper's attempts to reconstruct the government would also be welcome...

But TBH I'd also be happy with just a shopping list, anything goes.