Those who are studying Hebrew may be interested to know that Gesenius' Hebrew Gramar is being posted on the internet section by section. More than half of the book is now available in electronic form. The book is old and is definitely hard reading (It is a reference not a primer), but studying it is worth the effort if one wants to know Hebrew.
http://www.adath-shalom.ca/gk_cont.htm
http://www.adath-shalom.ca/gk_cont.htm