I have probably read them all over the years and think that in reference to modern catamarans that the books
by White, Kanter and Tarjan are all excellent. They each have their biases but are all good reads. One note; Kanter's new book is really more of a new edition of his older one. Just get the new one. Another usefull reference is "The Sailor's Multihull
Guide" By Jeffries and Kantor. Another great book but a bit dated now and probably not what your are looking for is Brown's "The Case For the Cruising Trimaran".