The following books pertain to the history of Costilla County and the surrounding San Luis Valley. Many of these books can be obtained at little or no cost through interlibrary loan.
|Albert H Pfeiffer, Indian Agent, Soldier, and Mountain Man.
Read about Col. Pfeiffer, the man who dueled the Navajo for possession of
the of the "Great Pagosa Hot Spring" for his Ute friends. Ann Oldham,
269 Oldham Place, Pagosa Springs, Colorado 81147
http://www.pagosasun.com/wilson/pfeiffer/ $24.95 plus S/H. Colo. residents add tax.
|The Culebra River Villages of Costilla County : village
architecture and its historical context, 1851-1940, by Arnold A. and Maria
A. Valdez. Call Number C978.835 V233cu Publisher San Luis, Colo. :
Valdez and Assoc., 1991. Description  p. : 1ll. ; 28 cm.
Note: also available from Colorado Historical Society, Office of Archaeology and Preservation, 1300 Broadway, Denver, Colorado by Maria Mondragon-Valdez ($3.50)
|Old Fort Garland, by State Historical Society of Colorado. Call
Number C978.84 C823co Publisher Denver, [c1954] Description  p. illus.,
ports., map. 21 cm. Contents A soldier's journal of life at old Fort
Garland, 1860-1883, by J.T. Forrest.--Fort Garland becomes a state museum,
by Rosamund Slack.
|Valley of the Cranes : Exploring Colorado's San Luis Valley, by
Virginia McConnell Simmons ; photographs by Wendy Shattil and Robert
Rozinski. Author Simmons, Virginia McConnell, 1928- Call Number 917.8833
S592vaL C917 .8833 S592vaL Publisher Boulder, Colo. : Roberts Rinehart,
1988. Description 64 p. : ill. (some col.), map : 23 x 27 cm.
|The Story of the San Luis Valley, by Frank C. Spencer. Call
Number C978.83 S745st Publisher Alamosa, Colo., San Luis Valley Historical
Society, [c1975] Description 3 p.l.,  p., l l., -83 p., l l. : 8
plates (1 port.) ; 22 1/2 cm. Notes Illustrations not included in
pagination. Reprint of the ed. printed by the Alamosa Journal in 1925.
|Land of the Blue Sky People : a Story of the San Luis Valley, by
Luther E. Bean. Call Number C978.83 S196be4 Publisher Alamosa, Colo. :
Printed by Ye Olde Print Shoppe, c1975. Description 121 p. : ill. ; 23 cm.
|Early history of the Cochetopa National Forest and Surrounding Region, prepared by Fred B. Agee and J.M. Cuenin. 1923 [manuscript] / Author Agee, Fred B. Call Number C MSS -M3 M34-2 Paging 67 leaves Summary History includes Indians, explorers, settlement, resources, and development of the Cochetopa National Forest region in northern part of the San Luis Valley, Colorado.|
|Colorado's San Luis Valley: A Pictorial History, Leland Fietz and Peggy Newcomb Barr; Little London Press, Colorado Springs, CO; 1997; ISBN 0936564426; 48 pages.|
|The People of El Valle: A History of the Spanish Colonials in the San Luis Valley, Olibama Lopez-Tushar; El Escritorio; Pueblo, CO; 2nd edition 1992; 3rd edition 1997; ISBN 0962897442; 276 pages.|
|Casa del Senor: A Brief History of the Sangre de Cristo Parish Church
and Its Mission by Maria Mondragon-Valdez ($10.00 plus postage).
Available at the Sangre de Cristo Parish