In a textbook I am looking to place a large left margin at every page of each chapter. At left printed pages a left margin and at right printed pages a right margin, so like a double sided construction. In this margin I would like to place:

1. Keywords and small descriptions to emphasize some text from the textflow

2. Figures

3. An expansion of a table that is placed in the main textflow but that needs to cover a wider range then the text area so it expands into the margin

What is the the easiest way to achieve this?

Jeroen