The Art of The Start
by Guy Kawasaki
A great and inspiring book. I particularly appreciated the no nonsense advice and strong focus on fundamentals. My bias towards the latter has always made me feel like a "pseudo-MBA" so Guy's advice increased my confidence in holding similar opinions.
I particularly enjoyed the material on bootstrapping. I have always found exciting the kind of action-based, goal-oriented bootstrapping that Guy describes which likely explains why I have spent the majority of my career in small, advanced development teams building prototypes of new technologies and products.
In summary, a great book that I highly recommend to anyone involved in starting new ventures, internal or external.