An Introduction to Ray Tracing

toll-free 1-888-412-7717, 1-719-471-5884, or text 719-331-0785; Owner: Douglas P. Clausen, dba
Clausen Books, RMABA, 2316 North Wahsatch Avenue, #234, Colorado Springs, CO 80907 USA;
Colorado Sales Tax license #24-81363-0000. For our customers in the Eurozone,
the used books we sell are zero-rated under the VAT and Clausen Books is not
required to have a VAT registration number. e-mail: bookmail@clausenbooks.com.
Visa, Mastercard, American Express, Discover/Novus, Checks, Money Orders, and
Paypal. RETURNS: Satisfaction guaranteed. Return within 10 days of receipt if
not
as described.

If you are a consumer you can withdraw from the contract in accordance with the following. Consumer means any natural person who is acting for purposes which are outside his trade, business, craft or profession.

Information regarding the right of withdrawal

Statutory right to withdraw

You have the right to withdraw from this contract within 14 days without giving any reason.

The withdrawal period will expire after 14 days from the day on which you acquire, or a third party other than the carrier and indicated by you acquires, physical possession of the last good or the last lot or piece.

To exercise the right of withdrawal, electronically fill in and submit a clear statement on our website, under "My Purchases" in "My Account". We will communicate to you an acknowledgement of receipt of such a withdrawal on a durable medium (e.g. by e-mail) without delay.

To meet the withdrawal deadline, it is sufficient for you to send your communication concerning your exercise of the right of withdrawal before the withdrawal period has expired.

Effects of withdrawal

If you withdraw from this contract, we will reimburse to you all payments received from you, including the costs of delivery (except for the supplementary costs arising if you chose a type of delivery other than the least expensive type of standard delivery offered by us).

We may make a deduction from the reimbursement for loss in value of any goods supplied, if the loss is the result of unnecessary handling by you.

We will make the reimbursement without undue delay, and not later than 14 days after the day on which we are informed about your decision to withdraw from this contract.

We will make the reimbursement using the same means of payment as you used for the initial transaction, unless you have expressly agreed otherwise; in any event, you will not incur any fees as a result of such reimbursement.

We may withhold reimbursement until we have received the goods back, or you have supplied evidence of having sent back the goods, whichever is the earliest.

You shall send back the goods or hand them over to Clausen Books, RMABA, Colorado Springs, Colorado, U.S.A., +1 719-331-0785, without undue delay and in any event not later than 14 days from the day on which you communicate your withdrawal from this contract to us. The deadline is met if you send back the goods before the period of 14 days has expired. You will have to bear the direct cost of returning the goods. You are only liable for any diminished value of the goods resulting from the handling other than what is necessary to establish the nature, characteristics and functioning of the goods.

Exceptions to the right of withdrawal

The right of withdrawal does not apply to:

1. The delivery of newspapers, journals or magazines with the exception of subscription contracts; and
2. The supply of digital content which is not supplied on a tangible medium (e.g. on a CD or DVD) if you accepted when you placed your order that we could start to deliver it, and that you could not withdraw once delivery had started.

phone: 1-719-471-5884, or toll-free in the US 1-888-412-7717, or text 719-331-0785; e-mail: bookmail@clausenbooks.com. SHIPPING AND HANDLING: ALL USPS SHIPMENTS (U.S. and Puerto Rico)INCLUDE DELIVERY CONFIRMATION. USPS Media Mail: Single Volumes $4.25; each additional volume $1.75, IN THE SAME ORDER. Heavier volumes may be priced higher. PRIORITY MAIL: Single Volumes $9.95, and $3.50 each additional book IN THE SAME ORDER. Heavier volumes will be priced higher. OVERSEAS ORDERS: Costs vary, based on weight, size and destination. Packages will be shipped via Global Priority Mail whenever possible and customer will be reimbursed for over-charges whenever possible. New US Postal Rates necessitate this change.