Hi.

There are many books out there to clear theoretical approach of organic chemistry. However, most recommended is Organic Chemistry by O P Tandon . I do not claim that it will be best for you, but it has some good explanation of the topics. You can also check books like- Organic Chemistry by Morrison & Boyd , Organic Chemistry by Paula Bruice and ofcourse, do not forget NCERT Chemistry if you have aiming for JEE Mains.

Best of Luck.

Dear,

Here are some of the best books to refer to build your organic chemistry concepts-

• Clayden Organic Chemistry
• Solomon's organic chemistry, Scott
• Klein Organic Chemistry
• Organic Chemistry as Second Language
• Advanced organic chemistry,Carey
• Wade Organic Chemistry
• McMurry Organic Chemistry