Mine and other people’s. Feel free to add more in comments.
Craft
Browne & King – Self Editing for Fiction Writers – craft book on structure and composition
Carroll, Peter J. – Liber KKK – real world magic structures
Edelstein, Linda – Writer’s Guide to Character Traits – analysis of personality types, behavioural patterns, triggers etc.
Edgerton, Les – Hooked – craft book on writing gripping openings
Machiavelli – The Prince – society-building guidelines
Marks, Dara – Inside Story: the Power of the Transformational Arc – how to use the heroic journey to create structure
Navarro, Joe – What Every Body Is Saying – book on body language
Pinker, Steven – The Language Instinct – the relationship between language and thought
Scott Bell, James – Plot & Structure – craft book on… well, plot and structure
Scott Card, Orson – How To Write Science Fiction & Fantasy – craft book dealing with issues specific to genre fiction
Vogler, Christopher – The Writer’s Journey – craft book looking at original mythic principles and story templates
Wynne, Douglas – The Crime Writer’s Hand Book – the symptoms and methods for 100+ ways to kill characters
Infographic – How to use the Harvard reference system – useful for bibliographies
Fiction
Baker, Keith – D&D’s Eberron – combining magic and technology
Buchan, John – John MacNab – using ‘filler’ text to build up personalities and motivations
Duncan, Hal – Vellum – unique construction with multiple POVs
Gavriel Kay, Guy – The Lions of Al-Rassan – religious structure in genre that is questionable rather than absolute
Gavriel Kay, Guy – Under Heaven & River of Stars – using Chinese history and literature in world-building
Gunn, Neil M. – The Silver Darlings – mixing languages in dialogue
Kapuscinski, Ryszard – The Emperor – details of a decadent imperial court
Le Guin, Ursula – The Other Wind – women in traditional magic systems
Lynch, Scott – Lies of Locke Lamora – world building whilst resisting the urge to explain
Martin, George R.R. – Game of Thrones – writing about war without excessive battle descriptions
May, Julian – Galactic Milieu – theological exploration in a sci-fi setting
Morgenstern, Erin – The Night Circus – non-linear structure
Russell, Mary Doria – The Sparrow – jumping between past and present perspectives throughout the story
Zettel, Sarah – Isavalta series (Bk. 1 Sorcerer’s Treason) – using Russian and Chinese mythology in magic and world-building