- Under Crescent and Cross
- Under Dark Waters: Surviving the Titanic
- Under Drake's Flag
- Under Drake's Flag (Illustrated)
- UNDER DRAKE’S FLAG: A Tale of the Spanish Main
- Under Egyptian Palms; or, Three Bachelors' Journeys on the Nile
- Under en brinnande himmel
- Under False Colours ... New edition.
- Under Fate's Wing
- Under Fire
- Under Fire: The Blitz Diaries of a Volunteer Ambulance Driver
- Under Fire: The Untold Story of the Attack in Benghazi
- Under Four Administrations: From Cleveland to Taft
- Under Full Sail
- Under God
- Under Himmler's Command
- Under Jerusalem
- Under Lincoln's Hat
- Under Milk Wood Revisited
- Under One Roof. An episode in a family history. Vol. I
- Under One Roof. An episode in a family history. Third volume.
- Under Osman's Tree
- Under Other Conditions: a tale. [Reprinted from the “Western Magazine and Portfolio.”]
- Under Pressure
- Under Providence - Short History of How an Island Conquered a Sub-continent
- Under Quarantine
- Under Red Skies
- Under Seal of Confession, Vol. I
- Under Seal of Confession. Vol. II.
- Under Seal of Confession. VOL. III.
- Under Siege
- Under Siege: The CEF Attack on the RNWMP Barracks in Calgary, October 1916.
- Under Six Flags: The Story of Texas
- Under söderns sol
- Under the African Sun: a description of native races in Uganda, sporting adventures, and other exper...
- Under The Axe Of Fascism
- Under the Big Top
- Under the Blue Beret
- UNDER THE CANOPY
- Under the Cope of Heaven
- Under the Crescent Moon with the XI Corps in the Civil War. Volume 2
- Under the Deodars. The Phantom 'Rickshaw. Wee Willie Winkie ... New edition, revised with additions.
- Under the Devil's Eye
- Under the Dome
- Under the Dragon
- Under the Electric Sky
- Under the Flags of Freedom
- Under The Gun
- Under The Gun
- Under the Influence
- Under the Influence, New Edition of the Unauthorized Story of the Anheuser-Busch Dynasty
- Under the Kapok Tree
- Under the L
- Under the Lash - A History of Corporal Punishment In the British Armed Forces
- Under the Leader’s Cloak
- Under the Liberty Tree - A Story of the Boston Massacre
- Under the Loving Care of the Fatherly Leader
- Under the March Sun
- Under The Parish Lantern
- Under the Prophet in Utah: The National Menace of a Political Priestcraft
- Under the Queen
- Under the Queen; or, present day life in England.
- Under the Radar
- Under the Rays of the Aurora Borealis: in the land of the Lapps and Kvæns ... [Translated from the N...
- Under the Red and Yellow Stars
- Under the Red Blanket
- Under the Red Crescent: adventures of an English surgeon with the Turkish army at Plevna and Erzerou...
- Under the Red Sea Sun
- Under the Shade
- Under the Shadow
- Under the Sign of the Big Fiddle
- Under the Socialist Banner
- Under the Southern Cross
- Under the Southern Cross ... Second edition. Revised, enlarged and illustrated
- Under the Soviet Shadow
- Under the Starry Flag
- Under The Stretcher
- Under the Turk in Constantinople: A Record of Sir John Finch's Embassy, 1674-1681
- Under The Wire
- Under This Roof
- Under Torn Paper Mountains
- Under Two Dictators: Prisoner of Stalin and Hitler
- Under Two Flags
- Underappreciated:
- Undercover
- Undercover Agent
- Undercover Duke
- Undercover Girl
- Undercover Muslim
- Undercover Operator
- Undercover Tales of World War II
- Undercover War
- Undercover Washington
- Undercover: Operation Julie - The Inside Story
- Underdånig Berättelse om en af Öfver-Direktören vid Landtmäteriel [L. B. F.], genom Wester-Dala...
- Underdogs
- Underemployment Among Asians in the United States
- Underestimated: Our Not So Peaceful Nuclear Future - Where We Are Headed, Worries, Going Ballistic, ...
- Underestimated: Our Not So Peaceful Nuclear Future, Second Edition - War Scenarios, China and Nuclea...
- Underestimating the Enemy: The Mistake That Starts Our Wars
- Underglobalization
- Underground
- Underground Asia
- Underground Factories in Germany Part 1
- Underground Factories in Germany Part 2
- Underground Humour In Nazi Germany, 1933-1945
- Underground in the Underdown
- Underground Philadelphia
- Underground Prescott
- Underground Railroad
- Underground Railroad in Delaware, Maryland, and West Virginia
- Underground Railroad in New York and New Jersey
- Underground Railroad in Pennsylvania
- Underground Reigate
- Underground Structures of the Cold War
- Underground to Palestine
- Underground to Palestine [First Edition]
- Underground Undermined: What Really Happened In South African Mines During Apartheid
- Underground Warfare
- Underground Warfare, 1914–1918
- Underground, Overground
- Underground, The Story of A People
- Undergångens skuggor
- Undersea Warrior
- Understand Chinese Mythology
- Understand Greek Civilization
- Understand Roman Civilization: Teach Yourself
- Understand Your Rights Because You're About to Lose Them!
- Understanding Primary Sources: Reconstruction
- Understanding Africa Book 1
- Understanding Ancient Fortifications
- Understanding Ancient Thought
- Understanding and Accounting for National Will in Strategies that Use Military Force: Case Studies o...
- Understanding and Managing North Korea's Nuclear Ambitions: DPRK Regime Survival, Use as Deterrence,...
- Understanding Boko Haram
- Understanding Byzantium
- Understanding Carl von Clausewitz
- Understanding Central Asia
- Understanding Change
- Understanding China [3rd Edition]
- Understanding China Today
- Understanding Chinese Culture