Shakespeare's Philosophy Illustrated - Quaternary Teaching Aids features a series of charts and diagrams in colour throughout its 192 pages. It is organised into four distinct Parts as teaching aids for a Quaternary level of understanding. Each Part provides a distinct entry point into Shakespeare's Sonnet philosophy. Part 1 surrounds the seventy-eight facsimile pages of the 1609 edition of Shake-speares Sonnets with succinct speech-balloon commentaries on the individual sonnets and their groupings and their relation to the companion poem A Lover's Complaint. Part 2 has fifty-three pages of charts and diagrams illustrating aspects of the Sonnet philosophy. They examine the relationship of Shakespeare's nature-based philosophy to philosophy in general along with the implications for a global demographic. Part 3 considers a number of historically enigmatic art works to demonstrate their relationship to all Shakespeare's plays and poems from the vantage of the Sonnet philosophy. Part 4 further explicates the relationships between the enigmatic images illustrated in Part 3. It features an essay on the creative depth shared by Leonardo da Vinci's one-off Mona Lisa, Marcel Duchamp's intentionally limited oeuvre and Shakespeare's entire output.