(To add to the other answers…)
In classical music — that is, the common-practice period of Western classical music — we've developed the idea that a musical score should tell you everything you need to perform a piece exactly as the composer intended: every note and rest, all the speeds and instrumentation and structure, the phrasing and articulation and expression, the ornaments and techniques. But 'twas not always so…
As I understand it, the earliest forms of notation were no more than an aide-mémoire for music that was already known. Basic elements like rhythms, speeds, and keys were not always stated explicitly. Some accidentals were expected to be inferred by the performer, as was any regular rhythmic pulse.
Gradually, over time, written notation became more explicit, and more precise, as composers wanted to provide more information to (and/or exert more control over) whoever performed their work. But some aspects were still up to the performers' discretion. (For example, we're still not entirely sure whether a piece like Bach's B Minor Mass was intended to be sung with one voice per part, or more…)
In some other traditions of music, performance is seen as more important than composition, and performers are expected to interpret, arrange, adapt, and bring their own styles and meanings and techniques to the music. (Think of folk music, for example.)
Rock and pop music mostly falls into the latter category: look at the importance and prevalence — and diversity — of cover versions, especially in the earlier years. The balance seems to be shifting a little — fuelled in part by the songwriting skills of the Beatles and others. But in general, performers are still likely (or at least, still expected) to bring significantly more originality to their performances of rock and pop music than in more composer-centric traditions.
That's why a chord book like the one in the question doesn't try to notate every aspect; it simply provides a starting-point and an aide-mémoire, expecting that you will fill in the rest from listening to the recordings and/or from your own creativity.
Certainly, when you're starting out, it pays to listen very carefully and try to understand and recreate every nuance you can; but as you gain experience, you'll be able to make creative decisions for yourself and make the song your own. And that's something that can't be notated.