These materials is available at careers360?
Some of the reference books which you can use for preparing SSC CHSL are -
* Verbal and nonverbal reasoning - RS Agarwal
* Analytical reasoning - M K Pandey
* Competitive general English - Kiran prakashan
* Quick learning objective general English - R S Aggarwal, Vikas Aggarwal
* Quicker mathematics - M Tyra
* Manorama yearbook ( English/ hindi )
* Lucent's general knowledge ( English / hindi )
Hope this helps.