Hi,

If your grammar is really weak, you can start with simple English books from Penguin or Wren & Martin or for simplified version try Longman guide English Usage.

To prepare for your English language test for SSC CGL exam below are some of the best books:

English  Language:

• English for General Competitions: from Plinth to Paramount (Volume – 1): Neetu Singh /KD Publications
• A mirror of Common Errors: Dr. Ashok Kumar /Academic and test publication
• Word Power Made Easy: Norman Lewis
• Competitive General English: Kiran Prakashan
• Objective General English: S. P. Bakshi

Is it Lucent book is good for ssc exam ?

Here are some of the books name you can prefer for english.

Firsly prefer Wren and Martin for the basic level

then prefer Objective general English by S P Bakshi, Mirror of Common Error

Advance English Grammer by Martin Hewings
Quick Learning Onjective General English by R S aggrawal

Here are some of the important tips you can prefer:

• Try to solve Previous Year Question Papers & Mock Test Papers.
• It will give you an idea about Exam pattern & it will make your speed faster of solving questions.
• Try to increase the level of difficulty of the questions you solve.
• It is really important to make your speed faster. Because you have to solve at least 160 questions out of 200.
• Focus on the topics on which you are not good.

Good Luck!