publisher's page). At 976 pages, this impressive biography takes a while. (I've been reading it for a few weeks and have just gotten to the part about his role in Muller v. Oregon, 208 U.S. 412 (1908).)
If you'd like something a little shorter (for now), see profiles on Biography.com, the Supreme Court Historical Society website, Brandeis University's site for its Legacy Fund for Social Justice, and the Oyez Project. The Brandeis University profile includes a sidebar with inspiring quotations, e.g.:
"We must make our choice. We may have democracy, or we may have wealth concentrated in the hands of a few, but we can't have both."and
“The greatest dangers to liberty lurk in the insidious encroachment by men of zeal, well meaning but without understanding.”
By the way, there was a campaign to make "Louie Louie" the state song of Washington. The State Department of Transportation lists it as the "State Rock Song (unofficial)." While interpretations of the lyrics vary, it's pretty clear that they have nothing to do with Justice Brandeis.