Debussy est l'une des plus pures gloires de l'art musical. Most of Debussy's preludes are easy to sightread- And it is funny to see this thread because I scanned through the book today. Bruyeres, La Fille aux Chevaux de Lin, Danseuses de Delphes, and Les sons et les parfums tournent dans l'air du soir are probably some of the easier ones, maybe even La Cathedrale engloutie, which I attempted to sightread today. Ministrels is not too big a challenge either. The longer ones are usually more difficult. If you take a look at them, they follow the usually "Debussian" pattern. The introduction, then the middle section-usually composed of fast scales or patterns, and a figuration at the end. Rythms usually get me in Debussy. Those ties can be confusing.

Don't be grounded to the Preludes, there is a lot to play in Debussy's repertoire. Estampes, mentioned above, is a great set. His Valse Romantique is quite romantic! And his Nocturne is quite delightful.