James Watson's Double Helix, an account of his work on the structure of the DNA molecule, has been delighting lay audiences since 1968, but was greeted with suspicion from the start by many scientists, including Watson's co-worker Francis Crick and the third Nobel laureate Maurice Wilkins. Anne Sayre is a personal friend of the late Rosalind Franklin, who appears in Watson's book as ""Rosy,"" a cranky, unattractive, humorless, uppity underling of Maurice Wilkins at Kings College (where a line of research was being pursued parallel to Watson and Click's simultaneous work at Cambridge). Sayre presents a wholly different version of what Watson calls the ""race"" to discover the molecule's structure: nobody except Watson knew there was supposed to be a race; if Wilkins and Franklin had not hated each other they would have made more rapid headway on the DNA problem; in any case Franklin would have discovered the correct solution on her own in three months or maybe three weeks (Francis Crick's opinion); Watson could not have found the answer when he did without semi-clandestine briefings on Franklin's progress; Franklin might well have replaced Wilkins as the third laureate had she not died in 1958, four years before the Nobel award. The experts and the surviving members of the original teams will have to thrash out the facts among them; what is clear is that--aside from an overly didactic, magisterial tone--Sayre makes an extremely sharp and impassioned case. Deserves wide attention.