As a result, there can be no definitive edition of The Book of Disquiet. Written on and off over a period of more than 20 years, seemingly beginning as a book by another of Pessoa's heteronyms, Vicente Guedes, and slowly evolving into the imaginary testament of Soares, it is a dishevelled album of thoughts, sensations and imagined memories that can never be fully deciphered. Any version is bound to be a construction. In his notes on the text, Richard Zenith recognises this and suggests that readers "invent their own order or, better yet, read the work's many parts in absolutely random order". Despite this disclaimer, readers of Zenith's edition will find it supersedes all others in its delicacy of style, rigorous scholarship and sympathy for Pessoa's fractured sensibility.