http://www.cadcim.com/
You can find e-books about catia,solidworks,inventer,pro-engineer,nx etc... from here.



http://www.cadcim.com/catia_v5r16/catia_v5r16.htm
I learn catia from these e-books
some chapters are pdf format but u can find all chapters in powerpoint. But it may diffucult to study on pover point. You must resize some pictures.