All Books (sorted alphabetically)
- 2010 CIA World Factbook United States. Central Intelligence Agency
- 20 hrs., 40 min. : our flight in the Friendship : the American girl, first across the Atlantic by air, tells her story Amelia Earhart
- 20-Mule-Team brigade : Being a story in jingles of the good works and adventures of the famous "Twenty-Mule-Team" Pacific Coast Borax Company
- 20 poemas para ser leídos en el tranvía (Spanish) Oliverio Girondo
- 21 Frank Crane
- 21 Jahre in Indien. Dritter Theil: Sumatra. (German) Heinrich Breitenstein
- 21 Jahre in Indien. Erster Theil: Borneo. (German) Heinrich Breitenstein
- 21 Jahre in Indien. Zweiter Theil: Java. (German) Heinrich Breitenstein
- 21st Missouri Regiment Infantry Veteran Volunteers: Historical Memoranda
- 23rd (Service) Battalion Royal Fusiliers (First Sportsman's) Fred W. Ward
- 25 Billeder for Børn (Danish) Christian Winther
- 25 vuotta (Finnish) Kasimir Leino
- 28th: A Record of War Service in the Australian Imperial Force, 1915-19, Vol. I Herbert Brayley Collett
- 2 B R 0 2 B Kurt Vonnegut
- 2nd Record Losey's Orchestra
- 30,000 locked out : the great strike of the building trades in Chicago James C. Beeks
- 30-day wonder Richard Wilson
- 30 Tempting Spaghetti Meals: Easy, Economical, Delicious Campbell Soup Company
- 3½ Monate Fabrik-Arbeiterin (German) Minna Wettstein-Adelt
- 32 Caliber Donald McGibeny
- 32nd Mersenne Prime David Slowinski
- 35 Sonnets Fernando Pessoa
- 365 bedtime stories Mary Graham Bonner
- 365 Foreign Dishes Unknown
- 365 Luncheon Dishes: A Luncheon Dish for Every Day in the Year Anonymous