Po - Beyond Yes and No

I'd always put Edward de Bono in a box of stuffy old thinkers, but I
was prompted to buy this based by a reference to it in a lecture on
creativity by John Cleese.

It's a very thought-bending book. It could be boiled down to "how to
think laterally by breaking out of the sequential patterns our brains
love".

It's a pretty radical manifesto for helping keep our minds open. Recommended.