This is by far the worst book I have had the displeasure of cracking open. The only place this belongs is the bathroom floor, just in case you run out of toilet paper and there are no bibles laying around. Despite his heavy accent, Chuang made no spelling errors in his book. This is because the book doesn't actually use any words besides those in the title. The text is merely a 709 page long hard-bound equation sheet. If you have the misfortune of needing this turd of a book for a class I suggest you leave it alone and instead rely on Kittel, Liu, and Singh. Keep in mind though that although Singh's book is the closest thing to a readable account of the physics of optoelectronic devices, it is still for the most part a crappy read and is riddled with typos.