We specialize in the hard sciences and mathematics books including astronomy, physics, artificial intelligence, and more. Additional specialties would include psychology, history, business and management. All books are shipped using US Postal System. If you require some other method of shipping, please email us before purchasing.

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Seller's business information

Orca Knowledge Systems Inc.
2 Prestwick Ct., Novato, CA, 94949, U.S.A.

Sale & Shipping Terms

Terms of Sale

Money back guarantee if not satisfied with the transaction. Will hold the book for 10 days awaiting payment. Will ship FedEx. Please email for shipping charges.

American Express, Visa, Mastercard and Discover cards accepted. Personal checks made payable to Orca Knowledge Systems Inc. Accept paper money orders. Accept Purchase Orders and will bill libraries and universities. Also accept credit cards through PayPal.

Foreign orders: American Express, Visa and Mastercard accepted. Make sure name, ad...

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Shipping Terms

Orders usually ship within 2 business days. Shipping costs are based on books weighing 2 lbs, or 1 KG. If your book order is heavy or oversized, we may contact you to let you know extra shipping is required.