[ADemocratNoMore]

May I suggest some form of e-ink display. While there is nothing available on the commercial market, I'm sure that, given enough money one could create a stealth device that looked like a common blank piece of notepaper until the e-ink layer was activated, at which point it would display preloaded bullet points and crib notes. Being non-transmissive in nature it could be read in ambient lighting without calling attention to itself like the screens on a tablet would.

[fuzzylogic]

I think that is very plausible. Unless somebody “checks the notepad” - and who would? - I think something is up, nobody would know.