Before I put them into Bookshelved which may take a while, here are my Top Ten books. (You will notice that I can't count).
The Timeless Way of Building : Christopher Alexander
The Accelerated Learning Handbook : David Meier
Lean Software Development : Tom and Mary
The Innovator's Dillema : Clayton Christenson
Agile Software Development : Alistair Cockburn
Managing the Design Factory : Reinertsen
Lean Thinking : Womack & Jones
The Goal : Goldratt
Options, Futures... : John Hull
Slack (My Way of Life) : Tom DeMarco
Practice What You Preach : David Maister
Social Life of Information : John Seely Brown