I found this book really useful.

The company i work for are low volume high mix and the book has some great techniques for improvement when the company is doing poorly and for when the company is doing well.

I was always told that Value stream mapping was impossible in job shops until this book. This book highlights the lean principles and adapts them to suit.  

There is still a stigma about low volume, high mix lean manufacturing. This book helps tackle that stigma and is a great tool for justifying change to upper management. 

I highly recommend that Job shop and made to order company's management read this book