We are glad to inform you that the 4th number of the ISSI Newsletter has come out.

Content:

• Editorial (B. Schlemmer)
• A look back for 2005 (M. Meyer)
• News, Announcements
• A Centennial 1906-2006 (B. Godin)
• Escher Staircases Dwarfed (R.Rousseau & H. Small)
• Book Review (A. Basu)
• H-Index for Price Medalists (W. Glänzel & O. Persson)