Robert A. Heinlein

"We need you to kill a man." The stranger had barely finished the sentence before he was dead across the tablecloth - and Dr. Richard Ames was framed for it. So begins Heinlein's late masterpiece of flight and misdirection: out the airlock of the elegant habitat Golden Rule, across the lawless surface of Luna, and - when the assassins keep coming - clean out of the universe as Ames knows it. With him every step: Gwen Novak, a bride with entirely too many talents, a past that won't scan, and a walking stick that is more than it appears.
What starts as a thriller becomes a reunion with the wildest architecture in Heinlein's imagination: the World As Myth, where fiction and fact trade places, where the Long family keeps its own calendar, and where a kitten named Pixel simply refuses to accept that walls exist. Unavailable in ebook until now, THE CAT WHO WALKS THROUGH WALLS returns in a complete authorized edition [verify phrasing] - the bridge between The Moon Is a Harsh Mistress, The Number of the Beast, and To Sail Beyond the Sunset, from the first Grand Master of Science Fiction, at his most playful and unguarded.
A Grand Master's victory lap through his own universes. Pixel included.