Terminus

Sixteen year-old Gary, desperate for a girlfriend, finds a pair of time-specs in a London park. They flip him into twenty-third century submerged London, a terrifying place where he meets the beautiful young Beetie, but he soon learns that love also brings unbearable burdens. Together with other rebels holed up in the disused London Underground, she leads Gary and his irrepressibly annoying friend, Mike, on a journey of passion, deceit, loyalty and terror... a journey to uncover the dark mystery of the Terminus, involving an enigmatic time-traveler called 'God' and an ancient Atlantean artifact.
'Once you pick up this chilling book, be prepared to climb onto an emotional roller-coaster which you can't get off until the story reaches its dramatic conclusion...'