Deny All Charges (The Fowl Twins #2)

Myles Fowl has found what he thinks is a source of knowledge, the likes of which humanity has never seen before, and so he goes after it. But what he doesn't know is that there are also some renegade fairies who are going after this source too. So when they both arrive at the same place at the same time to find this knowledge, which is not what they think it is, shenanigans and adventures ensue.