Here are a few to consider:
Creativity
Accidental Genius -- Mark Levy
Imagination Engineering -- Clegg & Birch
Beyond Words -- Milly Sonneman
The Mind Map Book -- Buzan & Buzan
Mindmapping -- Joyce Wycoff
How to Think Like Einstein -- Scott Thorpe
Cracking Creativity -- Michael Michalko
Intuition
Breakthrough Intuition -- Rosemary Guiley
Practical Intuition -- Laura Day
Practical Intuition for Success -- Laura Day
Improvement?
Natural Brilliance -- Paul Scheele
Getting Things Done -- David Allen
To Do..Doing..Done! -- Joyce Wycoff
The Power of Focus -- Canfield, Hansen, Hewitt
The PowerMind System -- Michael Kiefer
Lessons from the Art of Juggling -- Gelb & Buzan
Thinking for a Change -- Michael Gelb
The Einstein Factor -- Win Wenger
Brain
The User Illusion -- Nrretranders, Sydenham
Hare Brain, Tortoise Mind -- Guy Claxton
Not all best sellers or gems, but all have some good info.