The same comments apply as for The Pinafore Picture Book , though it is not, to my mind, quite as funny. The Gilbert and Sullivan Book. Browne, Edith A. W.S. Gilbert. The first full-length work on Gilbert, the result of a number of interviews with him, and proofread by him. Discursively written, but worth getting if you can.
Copies are difficult to find, unfortunately.
Sutton, Max Keith. This is undoubtedly the best modern study of Gilbert from a literary-critical point of view. I think he pushes the idea of Gilbert as radical satirist a bit too much, but there's no doubt the evidence is there to support his arguments. Don't let it out of your sight till money has changed hands and it is firmly yours, and protect it as you would gold bullion. It will be a revelation to you.