Ubik: Searching for other life style...

It's a book that I read long time ago, but I keep in mind for the "half life" concept. I think is a good book to read, but also lets you experiment through "Ella", the wife of the protagonist, the features and problems of this life style.

There's an introduction here: http://en.wikipedia.org/wiki/Ubik

It has been pleasant to see all the references taken from this book. A good sentence from Philip K. Dirk: "In my writing I even question the universe; I wonder out loud if it is real, and I wonder out loud if all of us are real.". I think he was a brilliant mad person.