The popularity of the First Edition of this book has been very gratifying. It confirms that there is a genuine need for a text covering the magnetic bubble technology. We are pleased that the readers have found that this book satisfies that need. It has been used as a text for courses in both universities and industry, and as a reference manual by workers active in the field. To meet the need for more copies of the book it seemed preferable to publish a second edition rather than merely a second printing. There has been some significant progress, even in the short time since the initial...