Janus Conjunction, what's your function?

I'm melting!<br /><br />We are back with The Janus Conjunction, the first novel by stalwart Doctor Who writer Trevor Baxendale. He brings us a tale of former allies now enemies ensconced on their own planets. But what is the function of these columns? There are giant spiders that put Shelob to shame, the titular conjunction, and melting flesh. Lots of melting flesh.