Hello aspirant, some of the best self help books to read are-

• The power of your subconscious mind
• The power of now.
• You can win
• Bhagvadgeetha
• The subtle art of Not giving a f*ck
• How to win friends and Influence people
• The magic of thinking Big.
• The Alchemist
• Rich dad vs Poor dad

You can find them for free online.

Thank you.