I know this hint was already solved in the book, but did anyone notice that there were hints about book 3 in this book? For example,

'Ah- your father hppened to leave it in my possesion, and I thought you might like it.' Dumledores eyes twinkled. 'Useful things...your father used it mainly for sneaking off to the kitchens to steal food when he was here.'

Doen't this remind you of some twins and a map we all know about? Just thought it was funny because I just noticed, and the third book was out a long time ago.