"There is much we still don't know, such as what happens to objects and information that fall into a black hole. Do they reemerge elsewhere in the Universe or in another universe? And can we warp space and time so much that one can travel back in time? These questions are part of our ongoing quest to understand the Universe. Maybe someone will come back from the future and tell us the answers. -- Stephen Hawking in the forweword to Black Holes and Time Warps by Kip Thorne
(Part I)

One the surface, Thorne's mathematical reasoning is impeccable. Einstein's equations indeed show that wormhole solutions allow for tiem to pass at different rates on either side of the wormhole, so that time travel, in principle, is possible. The trick, of course, is to create the wormhole in the first place. -- Michio Kaku -Hyperspace, chapter 11
(Part II)

If I have a time machine (wormhole-based or other-wise), I should be able to use it to go back in time and kill my mother before I was conceived, thereby preventing myself from being born and killing my mother. Central to the matricide paradox is the issue of free will: Do I, or do I not, as a human being, have the power to determine my own fate? -- Kip Thorne --Black Holes and Time Warps, chapter 14
(Part III)

The next morning the Jews formed a conspiracy and bound themselves with an oath not to eat or drink until they had killed Paul. More than forty men were involved in this plot... But when the son of Paul's sister heard of this plot, he went into the barracks and told Paul. --Acts 23:12-16 (NIV)
(Part IV)

tessara (noun), plural tesserae
1. Each of the small pieces used in mosaic work.
2. A small square of bone, wood, or the like, used in ancient times as a token, tally, ticket, due, etc.
--Webster's Encyclopedic Unabridged Dictionary of the English Language
(Part V)

Rivka Meyers knew something was wrong when she bumped into a wall that wasn't there. (Prologue)

Rivka raised her pick high overhead and swung it again into the hard-packed earth.

Something brushed the back of Ari's neck. He flicked at it. An instant later, he felt the sudden, sharp lance of a hornet sting.

The mosaic was a portrait of Rivka and Ari-- under a wedding canopy. (Epilogue)