"Diamond Dogs" is David Bowie's most coherent concept album and one of my five favorite.  The album was originally supposed to be a rock-opera version of George Orwell's "1984."  Though Orwell's estate put a halt to  the plan, "Diamond Dogs" is barely disguised and only slightly diluted.  Several songs borrow language directly from Orwell's book, not the least of  which being Bowie's first disco song, "1984."