Upon reading 3/4 of Michael Crichton's "Sphere" and reviewing blog history.

This alien monster appears to have a pulse.  Your readership keeps it alive.  First it nibbles away at your eyes.  Then it burrows into your brain.  It may hide away in there for a time, ruminating, making cud of your lost memories, regurgitating them as your dreams, masticating them over and over again until they form a tiny doorway into your heart.  The creature will try to squeeze its bulk through the orifice.  It will clutch its jaws around the organ.  Your heart and the creature will entangle and become indistinguishable.  You have given it life.  The story is within you now.  May your alien life also find a pulse, and spawn in others.