The story
1990 Capstone Press acquired
1991 Capstone Press first titles released
1998 Pebble brand created
1999 Capstone creates their first imprint, Compass Point Books
2001 Capstone creates their second imprint, Picture Window Books
2002 Red Brick Learning Launched
2003 FactHound.com Launched
2004 Pebble Plus launched
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2005 Capstone creates their third imprint, Stone Arch Books
2007 Capstone Publishers (Capstone) established to unite imprints
2007 Capstone Interactive Library Launched
2008 Capstone acquired Heinemann Global Library
2008 Capstone Launched CollectionWiz
2009 PebbleGo Launched
2009 Capstone Digital Launched
2010 PebbleGo Earth and Science Launched
From Wikipedia’s article on Capstone Publishers, shared under CC BY-SA 4.0.3