The Towers of Utopia
Mack Reynolds
Bat Hardin (2)
The Towers of Toron
Samuel R. Delany
The Fall of the Towers (2)
The Towers of the Sunset
L. E. MOdesitt, Jr.
The Saga of Recluce (2)
The Towers of Melnon
Roland J. Green
Richard Blade Adventures (15)
The Tower
Simon Clark
Colin Wilson
Spider World (1)
The Tower on the Rift
Ian Irvine
View from the Mirror (2)
The Tower of Zanid
L. Sprague de Camp
Viagens Interplanetarias (6)
Tower of the Medusa
Lin Carter
Tower of the King's Daughter
Chaz Brenchley
Outremer (1)
Tower of the Gods
Thomas A. Easton
Organic Future (4)
The Tower of Ravens
Kate Forsyth
Rhiannon's Ride (1)
The Tower of Oblivion
Oliver Onions
The Tower of Fear
Glen Cook
The Tower of Death
Andrew J. Offutt & Keith Taylor
Cormac Mac Art (7)
The Tower at Stony Wood
Patricia A. McKillip
The Tower and the Hive
Anne McCaffrey
Tower and the Hive (5)
The Tower and the Emerald
Moyra Caldecott