Childrens book character stamps

I just found this set of stamps on the net and I have to have them.They were reliased last year by the USPS. Ebay gave me no joy so I will have to keep searching. The Americans do such great stamps. I love the annual LOVE stamp.I haven't bought stamps for so long and now I have a desperate desire to go and blow all my money on them. I may even have to restart my Australia Post stamp subscription so I can get all of therir releases. Might see if I can do the same thing at USPS.