If you're flummoxed about dot-gain, levels, curves, calibration, moiré effects and the rest, then this book is for you. It explains, in terms that graphic designers will understand, what happens between sending your digital file to the printer and receiving the finished artwork. Through this, it tells you how to avoid the common (and not so common) pitfalls of the printing process.
At times it is heavy going, but then I tried to read it cover to cover - it might be better to dip in as and when needed. It talks you through all the bits in Photoshop you probably never used and couldn't work out what they were for. It would prove especially useful if you're on a tight budget and your printer is not as helpful as they might be.
Written by someone with years of experience in printing - both in the UK and the USA - I think it's the first (and so far, only) book of its kind, and therefore a must for students and practicing designers.