Wow, I didn't know my Galaxy S4 could do that! Many a time, this was my reaction when I read about something that I wasn't aware of. The book has a lot of graphics and screenshots that make it a real pleasure to read and understand. When I got my new S4, I had often wondered what certain options meant and how some apps were used and this book actually covered those topics very well. I actually started using some of the apps, like S Health, after reading this book.
Of the many things I learned, I could sync my calendar with Google Calendar and Outlook, start watching movies and TV shows while they are loading, send pictures and videos wirelessly to your TV, etc. Pretty neat book and expansive coverage overall. This book is actually 485 pages but you should be able to skim through it pretty fast.