This is the worst book I have read so far. There are so many errors in the book! And all descriptions about J2ME are vague. It's really a pity that I spent my money on this useless book.
Don't buy this book!!!

If you are a developer and eager to find resource on Java Mobile development, this book must disappoint you. This book just give you a general java mobile concept. May be this technology is too green so that all topics are not in depth to discuss with very limited examples.

The worse of this book is some examples just show the source code only with no any demonstration of the program running or even the complied result and that made people hard to understand what the source code mean.

If you see the content that this book cover MIDP for Palm. Don't believe this, this book is only cover the early stage of java KVM in Palm but not included the current Sun MIDP for Palm OS

I found this book very useful for getting to grips with the wide range of technologies available for Java platform on mobile devices. It's strong point is the breadth of subjects covered and not the depth. However, if like me, you prefer to get on to a quick start and the get deeper into the subject on a "as needed" basis this book will provide it. It got me up to date and able to continue on my own from the first three chapters.
If you are already an experienced J2ME developer then the case studies will show how others have tackled some J2ME problems. If you are a beginner then you will get a complete treatment of the range of technologies.