First of all, despite claiming to contain "just about every song" by The Beatles, the book does leave out some important ones: Here Comes The Sun and While My Guitar Gently Weeps included. Presumably this is due to some issue about getting permission from Harrison or his estate. The introduction to the book references to both Lennon and Harrison as still being alive, so it was first published before late 1980. You'd have thought that it would have been updated in the past 30-odd years ...
Also, the songs are generally not transcribed in the key that they were recorded in. Come Together was recorded in Dm, but is written here in Cm, for example. Plus, the inclusion of organ registerations does hint at some truly cringeworthy play-alongs using totally inappropriate instruments; but if it keeps certain people happy, that's fine I guess.
Despite these faults, this is a decent book for studying the Lennon-McCartney songwriting partnership and their techniques; not to mention learning some of the best songs ever recorded.
I would say check one out in Borders or Waterstones before buying it (on Amazon, of course, where it's cheaper). There may be better books for what this one claims to do.