Knowledge Publications Steven Harris sell science books and other products Turtle Creek Pennsylvania
Made an order for molecular seives. After a month went my I did not receive order. I contacted company and was told shipping was going to cost more and they would follow up when they got the exact shipping quote. I never received the product, emails are not responded to and phone is dissconected.
I also requested to be removed from their mailing list. I was removed for a while but re-added. Had to request to be removed again.
Bottom line. Doesn't ship product and doesn't respond to emails. Avoid.