The price for C and the 8051 has remained constant since the latest edition was released… and considerably less expensive than most microcontroller texts. Unfortunately my printer, Lightning Source, has revised their price schedule and now defines the book size as ‘large’, increasing the per/page cost. While I do not aim to get rich, at the present price the book is netting me about $1 per copy sold and I soon might have to pay for each copy! So the price has been increased effective July 30 to $49.95 US. Of course, buying online Amazon works with their 50% discount to bring it in at a lower price to you, but it should provide a reasonable, say $10, royalty to me. If you are hesitating, now would be the time to buy before the price goes up.