yes, that would be good. maybe a book with a few different shorter stories about his history, rather than a long one; but telling them in past tense (still narrated by bartimaeus of course) so that it's after the events of the trilogy and stuff doesn't have to be re-explained.
or maybe a book after the trilogy (despite what i said in my other post) where it goes from present tense to past tense (stories of bart's history) between chapters, like it did in ptolemy's gate, with the scenes in alexandria, if that makes sense.
what i mean by a story in the present after the events of the trilogy is like the one on the bartimaeus trilogy website. if you haven't, go to the site and read Bart's Journal. It's written by JS, and it's good. Something along the lines of that exept with history of bartimaeus flash-backs. Sorry if this hurried post has confused anyone.
When I set out from the boy's attic window, my head was so full of competing plans and complex strategems that I didn't look where I was going and flew straight into a chimney.
Something symbolic in that. It's what fake freedom does for you.