Can you recommend a "better writing" book

Hi everyone,

It is my first post here, so yes - hello everyone

Few years ago the level of my english writing reached a level I have been long comfortable with.
But now, realising, it is on the level, which I just can't accept over a long term, so I am ready
to learn and improve.

Having said that - can you recommend me a book I could use to improve my writing.
I did the research on amazon, but it offers so many good, based on "trusted" reviews, books,
making it difficult to choose.

If you can help me and suggest a few proven titles - I would really appreciate your help.

Thank you.