History of the Great Civil War: v. 4: 1647-49 by Samuel Rawson Gardiner
S.R. Gardiner's seminal work on the "Great Rebellion" has been accepted since it first appeared at the end of the 19th century as the chronological basis for all that has been written since. Available in four volumes, the first of which traces events from the beginning of the conflict to the Battle of Marston Moor, which was to prove the turning point for the Parliamentarian cause. This volume contains an introduction by Christopher Hill, an authority on 17th-century English history, in which he sums up Gardiner's importance both in his own time and for ours.