I got a surprise in the mail yesterday. An envelop with this book inside. Paulette from Sweet P Quilting and Creations had been to Calgary and went to a sale. She spotted this book and knew who to buy it for. She actually told me it was in the mail but I didn't know which one until I opened the envelop yesterday.
Superior Threads. You can buy the donuts individually or as a pair. I also found the Test Bobbins which have some imperfect winds and samples.