Ten books on hymnody which should be in every
church musician and pastor's library:

Harry Eskew and Hugh McElrath. Sing with Understanding: An Introduction to Christian Hymnody, Second Edition, Revised, Nashville: Church Street Press, 1995.

Edward Foley, editor. Foundations of Christian Music: The Music of Pre-Constantinian Christianity. Collegeville, MN: The Liturgical Press, 1996.

Gracia Grindal. Lessons in Hymnwriting. Boston: The Hymn Society in the United States and Canada, 2000.

Donald P. Hustad. Jubilate II: Church Music in Worship & Renewal. Carol Stream, Ill: Hope Publishing Co., 1993. [Formerly, Jubilate! Church Music in the Evangelical Tradition.] Carol Stream, Ill: Hope Publishing Co., 1981.

Deborah Carlton Loftis. The Hymn, A Journal of Congregational Song: Cumulative Index, 1982-1997, volumes 33-48. Boston, Mass.: The Hymn Society in the United States and Canada, 1998; & The Hymn, A Journal of Congregational Song: Cumulative Index, 1939-1981, volumes 1-32. Boston, Mass.: The Hymn Society of America, 1982.

Milburn Price and David Music. A Survey of Christian Hymnody. Carol Stream, Ill: Hope Publishing Company, 1989. [Originally written by William J. Reynolds in 1963 (NY: Holt, Rhinehart, Winston, 1963), the book was revised by Reynolds and Price in 1977. The current edition was revised and enlarged by Price and Music in 1989.]

Paul Westermeyer. Te Deum: The Church and Music. Minneapolis: The Fortress Press, 1998.

Paul Westermeyer. With Tongues of Fire: Profiles in 20th Century Hymn Writing. St. Louis: Concordia Publishing House, 1995.

Brian Wren. Praying Twice: the Music and Words of Congregational Song. Louisville, Westminster John Knox Press, 2000.

Carlton Young, Editor. Companion to the United Methodist Hymnal. Nashville: Abingdon Press, 1993.

The Hymn (Journal of The Hymn Society in the United States and Canada). Boston: The Hymn Society in the United States and Canada.

Journal of The Hymn Society in Great Britain and Ireland

Dedicated to encouraging study and research in the field of hymnody, promoting good standards of hymn-singing, encouraging the discerning use of hymns in worship and sponsoring relevant publications.

Reformed Liturgy & Music. (Joint Office of Worship of the United Presbyterian Church, USA, and the Presbyterian Church, USA, in cooperation with the Presbyterian Association of Musicians)

Check out:

The Dictionary of American Hymnology (DAH)

The Dictionary of American Hymnology Project (DAH), with the support of the Oberlin College Library and the Hymn Society in the U.S. and Canada, provides data related to hymns and hymnwriters as well as the history of congregational song in America. The project comprises four sources for research: an index of first lines of hymns from 1640 to 1978 with a supplementary index 1978 to present; a bibliography of some 5000 hymnals published in America (1817 denominational + 3192 non-denominational); an author file; and a biographical file.

The Hymnology Annual, editor Vernon Wicker. Published by Selah Publishing

The Hymnology Annual is an international forum on the hymn and worship, and has become one of the most respected journals in its field. Each volume is a substantial contribution to the study of hymnody. You can't find some of these articles anywhere else, and it brings together articles from disparate sources you might never find or hear of. If you want to be knowledgeable about hymnody, this is required reading

100 Hymn Tunes You Should Know
Hymnology Classes
The History of Christian Hymnody
Hymnody Links
Hymnody Software

Check out the Hymnal and Hymnology Bibliography at the Appalachian State University Library (unavailable)