What is the best way to learn the basics of auditing?

Continuous study and training ....................

Internet will give you a basic idea. Assisting an auditor will help you in practicing what you have learnt on the internet.

books,online learning , working with auditor .............................

Read a book please--------------------------------------

Thanks for invite..

In my opinion studying through Internet (Online books, Websites, Online classes etc...) is the best and cheapest way to learn the basics of audit. The main advantage is that, you can learn and refer any time you want.