Code Complete by Steve McConnell
The only programming book I use without fail every working day ;)
Seriously though, this book is great.
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About
Dave Marshall is a Software Engineer living near Hull, England. He works on various personal projects and is the Technical Manager at Childcare.co.uk
Dave specialises in web application development for the LAMP stack, but always tries to choose a tool set that is most fit for purpose.
Dave is a Zend Certified Engineer and a Member of the British Computer Soceity.