The Songwriting Secrets Of the Beatles

Hello Beatles readers.
Excuse for my bad English, I'am 36 years old and I'am Italian.
I like playing and studying guitar and piano, but when I play Beatles songs I'am abducted and enraptured, and it's the reason for which I read many Beatles book about musical analysis.
What do you think about these two books recently published "The Songwriting Secrets Of The Beatles" - Dominic Pedler - and "The Songs of John Lennon. The Beatles Years" - John Stevens - ? I think it's serious musical analysis, even if knew how the Beatles to not read music.
For like reason the music of the Beatles not is only universal and absolute but it is study matter and of endless discussions?

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