Target Novels have been around since the 70s when it was decided to publish each televised story as it's own paperback. Many of them were written by the writers of the tv story. All Classic stories were novelized except for 5 (City of Death, Shada, The Pirate Planet, Resurrection of the Daleks, and Revelation of the Daleks).
In 2015, the Target line was restarted with the introduction on one Classic Story (City of Death) and 4 stories from the New series (Rose, The Christmas Invasion, The Day of the Doctor and Twice Upon a Time). Only time will tell whether they will continue to novelize all the New stories.
It is important to note that many of titles began "Doctor Who and ..." then followed by the story title. This is one reason why many fans insist that it is ok to call the character either the Doctor or Doctor Who.
William Hartnell
Doctor Who and an Unearthly Child
Doctor Who and the Daleks
The Edge of Destruction
Marco Polo
Doctor Who and the Keys of Marinus
The Aztecs
The Sensorites
The Reign of Terror
Planet of Giants
Doctor Who and the Dalek Invasion of Earth
The Rescue
The Romans
Doctor Who and the Zarbi (The Web Planet)
Doctor Who and the Crusaders (The Crusade)
The Space Museum
The Chase
The Time Meddler
Galaxy 4
Mission to the Unknown
The Myth Makers
The Mutation of Time
The Massacre
The Ark
The Celestial Toymaker
The Gunfighters
The Savages
The War Machines
The Smugglers
Doctor Who and the Tenth Planet
Patrick Troughton
The Power of the Daleks
The Highlanders
The Underwater Menace
Doctor Who and the Cybermen (The Moonbase)
The Macra Terror
The Faceless Ones
The Evil of the Daleks
Doctor Who and the Tomb of the Cybermen
Doctor Who and the Abominable Snowmen
Doctor Who and the Ice Warriors
Doctor Who and the Enemy of the World
Doctor Who and the Web of Fear
Fury from the Deep
The Wheel in Space
The Dominators
The Mind Robber
The Invasion
The Krotons
The Seeds of Death
The Space Pirates
Doctor Who and the War Games
Jon Pertwee
Doctor Who and the Auton Invasion (Spearhead from Space)
Doctor Who and the Cave Monsters (Doctor Who and the Silurians)
The Ambassadors of Death
Inferno
Doctor Who and the Terror of the Autons
The Mind of Evil
Doctor Who and the Claws of Axos
Doctor Who and the Doomsday Weapon (Colony in Space)
Doctor Who and the Daemons
Doctor Who and the Day of the Daleks
Doctor Who and the Curse of Peladon
Doctor Who and the Sea-Devils
Doctor Who and the Mutants
The Time Monster
The Three Doctors
Doctor Who and the Carnival of Monsters
Doctor Who and the Space War (Frontier in Space)
Doctor Who and the Planet of the Daleks
Doctor Who and the Green Death
Doctor Who and the Time Warrior
Doctor Who and the Dinosaur Invasion (Invasion of the Dinosaurs)
Death to the Daleks
Doctor Who and the Monster of Peladon
Doctor Who and the Planet of the Spiders
Tom Baker
Doctor Who and the Giant Robot (Robot)
Doctor Who and the Ark in Space
Doctor Who and the Sontaran Experiment
Doctor Who and the Genesis of the Daleks
Doctor Who and the Revenge of the Cybermen
Doctor Who and the Loch Ness Monster (Terror of the Zygons)
The Planet of Evil
Doctor Who and the Pyramids of Mars
Doctor Who and the Android Invasion
Doctor Who and the Brain of Morbius
Doctor Who and the Seeds of Doom
Doctor Who and the Masque of Mandragora
Doctor Who and the Hand of Fear
Doctor Who and the Deadly Assassin
Doctor Who and the Face of Evil
Doctor Who and the Robots of Death
Doctor Who and the Talons of Weng-Chiang
Doctor Who and the Horror of Fang Rock
Doctor Who and the Invisible Enemy
Doctor Who and the Image of the Fendahl
Doctor Who and the Sunmakers
Doctor Who and the Underworld
Doctor Who and the Invasion of Time
Doctor Who and the Ribos Operation
The Pirate Planet
Doctor Who and the Stones of Blood
Doctor Who and the Androids of Tara
Doctor Who and the Power of Kroll
Doctor Who and the Armageddon Factor
Doctor Who and the Destiny of the Daleks
City of Death
Doctor Who and the Creature from the Pit
Doctor Who and the Nightmare of Eden
Doctor Who and the Horns of Nimon
Doctor Who and the Leisure Hive
Meglos
Full Circle
Doctor Who and the State of Decay
Doctor Who and Warrior's Gate
Doctor Who and the Keeper of Traken
Logopolis
Peter Davison
Castrovalva
Four to Doomsday
Kinda
Doctor Who and Visitation
Black Orchid
Earthshock
Time-Flight
Arc of Infinity
Snakedance
Mawdryn Undead
Terminus
Englightenment
The King's Demons
The Five Doctors
Warriors of the Deep
The Awakening
Frontios
Resurrection of the Daleks
Planet of Fire
The Caves of Androzani
Colin Baker
The Twin Dilemma
Attack of the Cybermen
Vengeance on Varos
The Mark of the Rani
The Two Doctors
Timelash
Revelation of the Daleks
The Mysterious Planet
Mindwarp
Terror of the Vervoids
The Ultimate Foe
Sylvester McCoy
Time and the Rani
Paradise Towers
Delta and the Bannermen
Dragonfire
Remembrance of the Daleks
The Happiness Patrol
Silver Nemesis
The Greatest Show in the Galaxy
Battlefield
Ghost Light
The Curse of Fenric
Survival
Paul McGann
The TV Movie
Christopher Eccleston
Rose
Dalek
David Tennant
The Christmas Invasion
Matt Smith
The Crimson Horror
The Day of the Doctor
Peter Capaldi
Twice Upon a Time
Jodie Whitaker
The Witchfinders
Non Televised Novelizations
Paradise of Death
The Pescatons
Shada