| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Fundamental Principles of Old and New World Civilizations | Nuttall, Zelia | en | | | | | 2010-04-20 |
| On The Principles of Political Economy, and Taxation | Ricardo, David | en | | | | | 2010-07-31 |
| An Enquiry Concerning the Principles of Morals | Hume, David, 1711-1776 | en | | | | Ethics; Conduct of life | 2003-08-01 |
| Peter Piper's Practical Principles of Plain and Perfect Pronunciation | Anonymous | en | | | | Tongue twisters; Alphabet books | 2008-04-09 |
| A Treatise Concerning the Principles of Human Knowledge | Berkeley, George, 1685-1753 | en | | | | Knowledge, Theory of; Idealism; Soul | 2003-12-01 |
| A Practical Discourse on Some Principles of Hymn-Singing | Bridges, Robert, 1844-1930 | en | | | | Hymns; Church music -- Protestant churches | 2007-06-06 |
| An Enquiry Concerning the Principles of Taste, and of the Origin of our Ideas of Beauty, etc. | Reynolds, Frances, 1729-1807 | en | Augustan Reprint Society, publication number 27 | | Clifford, James L. [Commentator] | | 2004-09-17 |
| The Principles of Success in Literature | Lewes, George Henry, 1817-1878 | en | | | | | 2003-12-01 |
| The Principles of English Versification | Baum, Paull Franklin | en | | | | | 2007-05-07 |
| Principles Of Political Economy
Abridged with Critical, Bibliographical, and Explanatory Notes, and a Sketch of the History of Political Economy | Mill, John Stuart, 1806-1873 | en | | | Laughlin, J. Laurence (James Laurence), 1850-1933 [Editor] | | 2009-09-27 |
| Some Principles of Maritime Strategy | Corbett, Julian S. (Julian Stafford), 1854-1922 | en | | | | | 2005-02-16 |
| The Principles of Breeding
or, Glimpses at the Physiological Laws involved in the
Reproduction and Improvement of Domestic Animals | Goodale, S. L. (Stephen Lincoln), 1815-1897 | en | | | | Livestock; Breeding | 2007-06-22 |
| Moral Principles in Education | Dewey, John, 1859-1952 | en | | | | | 2008-04-25 |
| Principles of Home Decoration
With Practical Examples | Wheeler, Candace, 1827-1923 | en | | | | | 2004-12-08 |
| Principles of Orchestration
With musical examples drawn from his own works | Rimsky-Korsakov, Nikolay, 1844-1908 | en | | | | | 2010-09-29 |
| Manures and the principles of manuring | Aikman, Charles Morton | en | | | | Fertilizers; Manures | 2008-11-16 |
| Principles of Freedom | MacSwiney, Terence J. (Terence Joseph), 1879-1920 | en | | | | Irish question; Home rule -- Ireland; Liberty | 2004-08-07 |
| Moral Principles and Medical Practice
The Basis of Medical Jurisprudence | Coppens, Charles, 1835-1920 | en | | | | Medical jurisprudence; Medical ethics | 2006-06-18 |
| Principles of Teaching | Bennion, Adam S., 1886-1958 | en | | | | | 2005-12-14 |
| Principles of Geology
or, The Modern Changes of the Earth and its Inhabitants
Considered as Illustrative of Geology | Lyell, Charles, Sir, 1797-1875 | en | | | | | 2010-07-22 |
| The Principles of Gothic Ecclesiastical Architecture, Elucidated by Question and Answer, 4th ed. | Bloxam, Matthew Holbeche, 1805-1888 | en | | | | Architecture, Gothic -- England; Church architecture -- England | 2006-11-08 |
| The Social Principles of Jesus | Rauschenbusch, Walter, 1861-1918 | en | | | | Jesus Christ -- Teachings; Christian ethics; Christian sociology | 2009-09-05 |
| Principles of Mining
Valuation, Organization and Administration | Hoover, Herbert, 1874-1964 | en | | | | Mines and mineral resources; Mining engineering; Mineral industries -- Finance | 2008-09-24 |
| The Battle of Principles
A Study of the Heroism and Eloquence of the Anti-Slavery Conflict | Hillis, Newell Dwight, 1858-1929 | en | | | | | 2006-06-11 |
| The Principles of Masonic Law
A Treatise on the Constitutional Laws, Usages and Landmarks of
Freemasonry | Mackey, Albert G. | en | | | | | 2004-04-01 |