| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Principal Navigations, Voyages, Traffiques and Discoveries of the English Nation — Volume 10
Asia, Part III | Hakluyt, Richard, 1552-1616 | en | | | | | 2004-04-01 |
| Principal Cairns | Cairns, John, 1818-1892 | en | | | | | 2004-02-01 |
| The Moon
A Full Description and Map of its Principal Physical Features | Elger, Thomas Gwyn, 1838-1897 | en | | | | | 2006-02-07 |
| An Architect's Note-Book in Spain
principally illustrating the domestic architecture of that country. | Wyatt, Matthew Digby, 1820-1877 | en | | | | | 2010-09-30 |
| Contemporary American Composers
Being a Study of the Music of This Country, Its Present
Conditions and Its Future, with Critical Estimates and
Biographies of the Principal Living Composers; and an
Abundance of Portraits, Fac-simile Musical Autographs, and | Hughes, Rupert, 1872-1956 | en | | | | Music -- United States -- History and criticism; Composers -- United States -- Biography | 2007-12-10 |
| Steam Turbines
A Book of Instruction for the Adjustment and Operation of
the Principal Types of this Class of Prime Movers | Collins, Hubert E. (Hubert Edwin), 1872-1932 | en | | | | | 2009-01-02 |
| A Catechism of Familiar Things;
Their History, and the Events Which Led to Their Discovery.
With a Short Explanation of Some of the Principal Natural Phenomena. For the Use of Schools and Families. Enlarged and Revised Edition. | Anonymous | en | | | | | 2005-09-20 |
| The Principal Navigations, Voyages, Traffiques and Discoveries of
the English Nation. Vol. XIII. America. Part II. | Hakluyt, Richard, 1552-1616 | en | | | | Explorers -- North America -- Letters; Voyages and travels; Discoveries in geography -- English | 2008-05-29 |
| The Book of Religions
Comprising the Views, Creeds, Sentiments, or Opinions, of All the Principal Religious Sects in the World, Particularly of All Christian Denominations in Europe and America, to Which are Added Church and Missionary Statistics, Togeth | Hayward, John, 1781-1869 | en | | | | Sects; Religions; Christian biography | 2009-10-24 |
| An Account of Some of the Principal Slave Insurrections,
and Others, Which Have Occurred, or Been Attempted, in the
United States and Elsewhere, During the Last Two Centuries. | Coffin, Joshua, 1792-1864 | en | | | | | 2006-06-16 |
| The Surrender of Napoleon
Being the narrative of the surrender of Buonaparte, and of his residence on board H.M.S. Bellerophon, with a detail of the principal events that occurred in that ship between the 24th of May and the 8th of August 1815 | Maitland, Frederick Lewis, Sir, 1777-1839 | en | | | Dickson, William Kirk, 1860-1949 [Editor] | Napoleon I, Emperor of the French, 1769-1821 -- Captivity, 1815-1821; Napoleon I, Emperor of the French, 1769-1821 -- Contemporaries | 2009-05-23 |
| Mary, the Help of Christians
Novenas in Preparation for the Principal Feasts of the Blessed Virgin | Hammer, Bonaventure, 1842-1917 | en | | | | | 2010-09-08 |
| Vegetable Teratology
An Account of the Principal Deviations from the Usual Construction of Plants | Masters, Maxwell T. (Maxwell Tylden), 1833-1907 | en | | | | | 2007-11-06 |
| Essays on Various Subjects
Principally Designed for Young Ladies | More, Hannah, 1745-1833 | en | | | | | 2006-10-21 |
| A History of England Principally in the Seventeenth Century, Volume I (of 6) | Ranke, Leopold von, 1795-1886 | en | | | | Great Britain -- History -- Stuarts, 1603-1714; England -- Civilization -- 17th century | 2009-04-09 |
| The Code of Honor, Or, Rules for the Government of Principals and Seconds in Duelling | Wilson, John Lyde, 1784-1849 | en | | | | | 2004-07-01 |
| The Principal Navigations, Voyages, Traffiques, and Discoveries of The English Nation, Vol. XII., America, Part I. | Hakluyt, Richard, 1552-1616 | en | | | | | 2004-10-05 |
| The Lives of the Fathers, Martyrs, and Principal Saints
January, February, March | Butler, Alban | en | | | | | 2007-01-26 |
| The Principal Navigations, Voyages, Traffiques and Discoveries of the English Nation — Volume 09
Asia, Part II | Hakluyt, Richard, 1552-1616 | en | | | | | 2004-01-01 |
| The Principal Navigations, Voyages, Traffiques and Discoveries of the English Nation — Volume 11 | Hakluyt, Richard, 1552-1616 | en | | | | | 2004-06-01 |
| On the Execution of Music, and Principally of Ancient Music | Saint-Saëns, Camille, 1835-1921 | en | | | Bowie, Henry P. [Translator] | Music appreciation; Gregorian chants -- History and criticism | 2009-11-07 |