One is close to completion and the pocket guide Birds of Celebes by Derek Holmes illustrates a selection of species, but, for the moment, serious birders still have to rely on “White & Bruce”: The Birds of Wallacea, an impressive work of taxonomic scholarship but a challenge to use for field identification. To overcome this problem, many birders come armed with notes and sketches of species from difficult or diverse families made from the excellent series of books dealing with individual families.