I'd recommend this book for the musically inclined among us, and those with inquisitive minds..
The Songwriting Secrets of the Beatles by Dominic Pedler
01. Tension, Resolution and the Power of V
02. The Three-Chord Trick and the Blues
03. The Minor Pop Chords
04. 'Supercharging' a Song with Secondary Dominants
05. 'Exotic birds' no and the Great Aeolian Cadence Mvstery
06. Relative and Parallel Minor Switches
07. 'Borrowing' ... and the Rise of Rock
08. The Modal Connection
09. Descending Bass, Inversions and 'Aug' chords
10. Middle Eights and Mega Modulations
11. Diminished: Songwriting Sleight-of-Hand
12. Tritone Substitution and Other Mystery Chords
13. The 'A Hard Day's Night' Chord - Rock's Holy Grail
14. Melody - Intervals, Motifs and Phrasing
15. Harmonisation in Focus
16. 'I nicked it!' Derivation, 'Plagiarism' and Pop
17. And in The End ... Lyrical and Tonal Movement
Appendices
1. A Beginner's Guide to Music Theory
2. Beatles Chords in Practice
3. All Introduction to Harmonisation
4. All Introduction to Beatles Song Form
5. Science, Surprise and the Tingle' Factor
6. A Summary of Early Beatles Influences
https://www.amazon.co.uk/Songwriting.../dp/0711981671