The document announces that on May 26th, 2011, the Early Dutch Books Online project by the University of Amsterdam and Leiden University will be sharing 4 secrets about happiness, fireworks, new technology and astronomy discoveries, as well as digitizing over 9,000 books and 2 million pages from 1781-1800 covering topics like history, politics, religion, society, science, drama, economy, trade, visual arts and literature. The digitized collection will be freely available on their website for users to read, enjoy, use, re-use, share, download, print and sell.