Presence

Rather than reading the book, I'd recommend to watch the TED talk by the author. While the first few chapters about presence are interesting, there is not much content in there. The last few chapters are basically the TED talk repeated. The whole book was filled with references to the TED talk and e-mails by viewers and how it helped them. Having watched the TED talk and having read a few books on the topic, there weren't many additional things to be learnt rather than acting as a reminder.

Cuddy has a TED talk that is a reasonable introduction to the content in this book.

This book talks a fair bit about body language, but instead of what it tells others, the primary focus is about using body language to communicate with yourself, and uses her own academic work, along with some others, to allow yourself to behave with confidence and set yourself up to project your genuine belief in yourself of your ideas to others. The TED talk might be sufficient for you, but if you want to go a touch deeper and get basic information about the research and methodology this is a sold read.