Can this book still be used or is it obsolete?

I just started studying law. My friend gave me a BarBri First Year Review 2007–2008 Edition. The latest edition is 2010–2011.

The topics covered are standard (torts, contracts, civil procedure, criminal, constitution, property). However, I am not sure if there have been major changes in those areas since 2007–2008.

Is the book still usable or should I get the new edition?

P.S. The book is not required so I don’t think the professors mind which edition I use for class activities, discussions, etc.