Wizard and glass: Dark Tower. Stephen King. 1997.

In the fourth powerful novel in Stephen King's best-selling fantasy quest, The Dark Tower beckons Roland, the Last Gunslinger, and the four companions he has gathered along the road.

And, having narrowly escaped one world, they set out on a terrifying journey across the scarred urban wasteland to brave a new world where hidden dangers lie at every junction: a malevolent computer-run monorail hurtling towards self-destruction, Roland's relentlessly cunning old enemy, and the temptation of the wizard's diabolical glass ball, a powerful force in Roland's first love affair. A tale of long-ago love and adventure involving a beautiful and quixotic woman named Susan Delgado.

And the Tower is closer...