How to Order

Kindly note that this is Knowledge Tree Resources' clearance website which features out-of-print, discontinued and old editions which are no longer part of our regular catalogue.

Ordering Details:

  • Payment option: Credit Card only.
  • Delivery fee: $25 flat.
  • Credit Card payment is processed via Paypal (No Paypal account is required, just check out with your details as a guest when re-directed there)


Once you have received a confirmation email to pick up, do make an appointment with us via phone or email.

  • Collection only by appointment, during weekdays (excluding PH), 11 am - 6 pm
  • Our address is Blk 106, Clementi St 12, #03-64, Singapore 120106.
  • Email only for self-collect queries pertaining to this website.
  • For other queries, email

Terms & Conditions:

Items sold on this mini-site are old new stock and are 'as in' condition. Knowledge Tree Resources makes no representation as to the physical condition or state of repair of the item. All items are checked for physical damage to the best of our ability before being dispatched. As these are clearance items, there will be strictly no refund/returns except for damaged and unusable items due to its nature. Customers must also bear the cost of returns or exchanges. Customers who self-collecting are advised to inspect their purchase before leaving.