DD is a good reader but she still likes me to read "harder" chapter books to her. We'd been through The Lion the Witch and the Wardrobe by the time she started school. We've done most of Roald Dahl and most of Enid Blyton (she loves Malory Towers but seems to have outgrown Secret Seven/Famous Five). So... where next? I'm tempted to introduce Harry Potter at this stage, partly because I haven't read them.... and I've also thought about the David Walliams books but am wondering if the themes in these are still too old for her. Any suggestions?