Dear Credence customer: We have adjusted our online prices slightly to keep up with the rising costs, of which all of us are all too aware in the current economic climate. Please note that our books and some products are still at the same price they have been for years! While the rest of the world increased prices along with inflation we have kept ours as low as possible. This recent adjustment will allow us to continue to provide the consistently high level of quality and service you have come to expect from Credence. As always, we thank you for choosing Credence and please do not hesitate to let us know if there is any way we can serve you better. - Phillip Day