The Collaborative International Dictionary of English v.0.48:
Domebook \Dome"book`\, n. [Dome doom + book.] (O. Eng. Law)
A book said to have been compiled under the direction of King
Alfred. It is supposed to have contained the principal maxims
of the common law, the penalties for misdemeanors, and the
forms of judicial proceedings. Domebook was probably a
general name for book of judgments. --Burrill.
Bouvier's Law Dictionary, Revised 6th Ed (1856):
DOME-BOOK, DOOM-BOOK or DOM-BEC A book in which Alfred the Great, of
England, after uniting the Saxon heptarchy, collected the various customs
dispersed through the kingdom, and digested them into one uniform code. 4
Bl. Com. 411.