Specialized web sites:
Civilwarcavalry.com is Eric Wittenberg's website. He's now the
owner of the most extensive web account of the battle.
The Gettysburg Discussion Group is also a good place to learn about the battle of Brandy Station and its place in the entire Gettysburg Campaign. Most of the work here has been done by Eric J. Wittenberg, who's working on what will probably become the definitive biography of John Buford.
Among their more relevant articles are:
"John Buford and the Gettysburg Campaign"
Eric Wittenberg's Brandy Station Seminar
Memoirs of the Confederate War for Independence by Heros von Borcke
I Rode with Jeb Stuart also known as War Years with Jeb Stuart by William Blackford
Campaigns of Jeb Stuart and his Cavalry by H. B. McClellan
Clash of Cavalry the Battle of Brandy Station June 9, 1863by Fairfax Downey
The Great Cavalry Battle of Brandy Station by Heros von Borcke
The Cavalry at Gettysburg by Edward G. Longacre
There's a neat book about Culpeper, Virginia called Seasons
of War: The Ordeal of a Confederate Community
by Daniel Sutherland. It has a chapter on the Battle of Brandy
Station and the presence of the Confederate cavalry before the battle.
Preservation: www.brandystation.org The Brandy Station Foundation
Brandy Station narrative from Fredericksburg and Spotsylvania National Park
Newspaper Report for the 8th New York Cavalry
Memoir of Captain Samuel B. Conyer 7th Virginia Cavalry
10th New York Cavalry Page on Brandy Station
Report of the 1st South Carolina Cavalry at Brandy Station
Article on the 6th Pennsylvania Cavalry at Brandy Station by Eric Wittenberg
Hampton's Cavalry at Brandy Station from The Civil War in South Carolina
2nd
Massachusetts Infantry at Beverly Ford
The Association for the Preservation of Civil War Sites has a superb map of the field on their web site
Library of Congress Historic American Building Survey of Little Fork Church in Brandy Station, VA.
From: Official Records of the War of the Rebellion Series I Vol. XXVII parts 1-3
Army of the Potomac
Pleasonton's Report--Pt 1. pg 902Gregg's Report--Pt. 1 pg 949
Duffie's Report--Pt. 1 pg 961
Army of Northern Virginia
Jeb Stuart's Report--Pt. 2 pg 679
Wade Hampton's Report--Pt. 2 pg 721
William "Grumble" Jones' Report--Pt. 2 pg. 748
Reports and telegrams from the Abraham Lincoln Papers from the Library of Congress
Col. Sharpe's Intelligence Report from June 7, 1863
General
Hooker's telegram to Lincoln on June 10, 1863
New York Times---June 14, 1863 story is the first of three days of coverage.
Baltimore Sun
Richmond Examiner--June 13, 1863 article on the arrival of 50 Yankee Prisoners.