'The LTspice IV Simulator' by Gilles Brocard
Linear Technoloy's LTspice simulator is a free, very high performance Spice simulator that is very much appreciated by professional designers and serious hobbyists alike. Gilles Brocart has written an extensive book with reference material, applications information and simulation methods. The book has a preface by LTspice's development manager Mike Engelhardt.
The book counts 740 pages and is published by Würth Electronik but they have agreed to make it available for Linear Audio readers.
Note: this is the English language version of the book! The German language version is here.
This book is now available at Amazon