The fifteenth ( ) novel in the New TOM SWIFT Invention Adventures series. Just two years ago Tom Swift and his best friend, Bud Barclay, journeyed through a wormhole and nearly lost their lives investigating a black hole phenomena. After returning Tom sent an unmanned reconnaissance probe back there to keep an eye on things. The time has come to replace it before it -dies.- But, when he does the first of the videos sent back reveal something so startling that Tom isn't certain what to believe. The probe shows him something Tom knows had to be in the past. What might it mean? The first thought...