I am disappointed by the lack of exercises in the Linear algebra section in Khan academy, It's also very limited in depth and scope.

Are there any other online resources that offer exercises like Khan academy on linear algebra? Or am I forced to read some book?

If I need to read a book, is there one that isn't overly sesquipedalian and written by a seething brainlet with an inferiority complex? I don't like reading most textbooks for this reason.