My memory of his entrance into my mind starts with non-knowledge: I had King Crimson Starless and Bible Black and Eno Another Green World without realising that the covers were by Phillips.
A synchronicity of sorts happened while I was in Canberra. There was an article about him in The Age Monthly Review, I found a copy of IRMA (Gavin Bryar's version of Phillip's libretto & score - he doesn't like this, but I love it) which was released on Eno's Obscure Records so I bought it, and the National Gallery had The Heart of A Humument in their shop.
Which brings us to what is his signature work - A Humument. He has taken a Victorian novel Mallock's A Human Document and with a mesmeric obsession excavated it. The Humument itself is in it's fourth edition - the first included every page of the novel as transformed by Phillips. Each page is a miniature marvel. Here is one at random drawn from the web.