<Where the pools are, how they're guarded, stuff about Yeerk tech - what they have, how to sabotage it, how to steal it - anything the Yeerks know about the likelihood or likely effectiveness of Andalite intervention, if there are any other aliens making themselves relevant out there, if there are any other strike points besides the three day cycle, odds on whether we can talk other Yeerks into becoming ducks-or-something without getting sold out, if they know anything Elfangor didn't get a chance to tell us about morphing, anything cultural or psychological useful for picking Controllers out of a crowd or spooking them.>