Nice little book. Padded with extras at the beginning and end because the core advice itself - the five steps that lead to a good idea - is so short and probably wouldn't justify a book because of its shortness!.. but in terms of content: highly highly recommended reading for all. You won't look at 'ideas' the same again.
A summary of the fives steps that lead to good ideas...
First: gather the raw materials;
the old existing elements related to your topic at hand.
Second: work over these raw materials
trying to bring the old elements into new combinations,
looking to find relationships,
trying consciously to produce a new idea or application.
Keep going, persist,
endure beyond tiredness
until you reach the hopeless stage,
until everything is a jumble in your mind with no clear insight anywhere.
Third: the incubating mental digestive stage.
Turn the problem over to your subconscious mind,
dropping it as completely as you can,
to do the synthesis while you distract yourself elsewhere.
Fourth: the birth of the idea.
The "Eureka! I have it" stage.
Out of nowhere the idea will appear
when cooking or bathing or in the middle of the night;
when you least expect it.
Fifth and final: the shaping and adapting of the idea
Taking your newborn idea into the world of reality.
And when you do,
you'll find it not quite the complete and marvellous child it seemed when you first gave birth to it.
Indeed don't make the mistake of holding your idea close to your chest.
Submit it to the criticism of the judicious.
A good idea after all has self-expanding qualities;
possibilities that you overlooked will come to light.