Sirius Thinking, Ltd. has hired Sharon Lerner as senior vice-president ofcreative development and animation producer for the new series BETWEEN THELINES, a series for children that is scheduled to premiere on PBS in April2000. Lerner was one of the first ten people hired by Children's TelevisionWorkshop to create SESAME STREET, and was, until recently, thevice-president and publisher of the Random House Children's Media Division.