This is definitely a book the group will enjoy. It's called Resonance by AJ Scudiere. It follows 4 scientists as they discover mutating frogs, dying people, and other species die-outs that leads them to the discovery of the polar shift. The really cool thing is that the publisher is offering AUTOGRAPHED copies at no extra charge for anyone who orders on Tuesday April 22! I already have a copy, but I'm definitely going to order another to get the autographed version. I think they will be worth a lot of money one day. This author has been getting great reviews and really did some homework before writing this novel. I really enjoyed the book and would love to chat with others who have read it 
You can get it on Amazon at: http://www.amazon.com/Resonance-AJ-Scudiere/dp/0979951003/ref=sr_1_2?ie=UTF8&s=books&qid=1204511182&sr=1-2
You can get it on Amazon at: http://www.amazon.com/Resonance-AJ-Scudiere/dp/0979951003/ref=sr_1_2?ie=UTF8&s=books&qid=1204511182&sr=1-2