Best books for sss CHSL preparation are

1) objective general English by S.P. Bakshi

2) Quick learning objective  general English

By R. S. Aggarwal and Vikad Aggarwal

3) word power made easy by Norman Lewis

4) Plinth to Paramount by Neetu Singh

The above mentioned books will help you prepare well.

hey,

here i am suggesting some of the good books in order to prepare for SSC CHGL

for english language

1. objective general english by S.P sakshi

2. quick learning objective general english by R.S aggarwal and vikas aggarwal

3. word power made easy by norman lewis

4. plinth to paramount by neetu singh

for mathematics

1. fast track objective arithmetic by rajesh verma

2. quantitative abilites arithmetic ability by kiran prakashan

3. quantitative aptitude by R.S agarwal

4. arithmetic for general competition vol 1 and 2 y neetu singh

for general intelligence and reasoning

1, analytical reasoning by M.K pandey

2. verbal and non verbal reasoning by R.S agarwal

3. a new approach to reasoning verbal , non verbal and analytical by B.S sijwali indu sijwali

for general awareness

1. general knowledge by Lucent publication

2. manorama yearbook by mammen mathew and philip mathew

3. current affairs by monthly magazine and newspaper

for more information you may refer to the link mentioned below

https://competition.careers360.com/articles/ssc-cgl-books

good luck!