Out of nowhere drops a super summer sun sale: All graded books are now available for half. That's 50% for the mathematicians among you. Just follow the LINK. First come, first serve!
Can I subscribe to Variants? What does "fn" mean? Why wasn't I immediatly directed to PayPal when ordering? Am I Batman? Most asked questions and answers for all our curious customers (old and new) in an orderly fashion can be found HERE!