Wavelets and Filter Banks

Coffee Cat Books is a small family-owned business. We specialize in scarce, out-of-print, and hard-to-find titles. Each book ships quickly and is packaged with care. Overseas? No problem: We pack with extra care and ship overseas regularly. If you have specific questions regarding shipping to your country, feel free to reach out before you order. We will do our best to give you an exact quote.

Returns:
They happen. We understand. We strive to make the return process as smooth and hassle-free as possible. We offer a 30 day return guarantee with a full refund for the item, excluding shipping costs. Please contact us with any questions.

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 Coffee Cat Books, 136 N Fields Circle, 27516, Chapel Hill, North Carolina, U.S.A., 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.

DOMESTIC SHIPPING:
We offer a choice of media mail (when applicable), first class, priority and/or expedited whenever possible. Choices for shipping methods vary and will appear at checkout (as well as additional opportunities to purchase insurance, extra insurance, etc.). All domestic orders include tracking.

INTERNATIONAL SHIPPING:
International shipping has become increasingly complex, but we do our best to keep up. If you have any questions regarding shipping to your country, feel free to reach out before you order. We will do our best to give you an exact quote.

All international orders include tracking and insurance. Expedited orders generally ship via USPS, DHL or Priority Mail International depending on the destination. Consolidated shipping is usually via Asendia or a similar, reliable carrier.

**VAT, Fees & Taxes: **
Where your country requires, and when under the value threshold set by your country, VAT is collected at checkout and remitted by the marketplace you ordered through. Any additional fees, duties, or taxes your country or carrier charges upon arrival are the buyer's responsibility (collected by your postal service or carrier when the package is delivered). The one exception is the European Union (see below).

The European Union:
As of 2026, the EU has added a new customs duty on every parcel entering the Union. Because of this, we are now required to prepay all duty and customs (DDP) before shipping, which is why you may notice that our EU rates run significantly higher than other countries. Additionally, on orders over 150 Euros, the full VAT tax due, over and above €150, is most often not collected by marketplaces at checkout. We may contact you through the marketplace you ordered to collect these additional VAT fees before shipping.

Typical speeds:
Although customs and overseas carrier delays sometimes happen and are outside of our control, the following should be a good guide (Business days only). If you need it faster, feel free to reach out. Sometimes we can achieve the “almost” impossible :)

Canada: Standard 10 to 21 days; Expedited, 6 to 12 days

United Kingdom: Standard 2 to 3 weeks; Expedited, 4 to 7 days by courier 

European Union: 6 to 12 days by courier

Australia and New Zealand: Standard 2 to 4 weeks; Expedited, 6 to 12 days

Japan, Asia, and the Middle East: Standard 2 to 4 weeks; Expedited, 1 to 2 weeks