need help for tutorials

hey guys i was just hoping if you could tell me where could i find tutorials/ebooks on the below mentioned topics....

1) FETs
2) CMOS (Weste)
3) Telecom switching by Thiagrajan Vishwanathan
4) Control Systems
5) Op amps and Linear IC by Ramakant Gayakwad
6) Signals and Systems maily dealing with Fourier part..

will be really glad if anyone has the links to these...