Hi, I've not read the books myself yet, but look good. However, I was wondering if anyone who has read could give me an idea of what age they may be suitable for? DD is 11 and has read and loved all the Skullduggery Pleasant books. Would Rivers of London be too adult for her? It popped up when I was doing a search for books like Skullduggery. I'm planning to read myself but she's looking for something new so was considering this. Thanks.