This book has just about everthing you want to know about spice from it's history in early 60's, to solving convergance in array of circuits,which are difficult to simulate.I found the book to be useful for it's tables to construct better and more models than I had ever imagined possible.The author does use alot of mathematical expressions to explain the spice syntax, but the format is great, and well thought out.This book is the "toolbox" for spice. Others fall short, but this book I'm gald to have on my shelf.