A Great book -- deep though

This was a really GREAT book, but definitely not a light read.  It's nonfiction and there's lots of science and DNA in it.  It's about Henrietta Lacks who was treated at John Hopkins Hospital for cervical cancer in the 1950's.  Her cells were grown in culture, multiplied by billions, sold, given away and used to develop the polio vaccine among many cutting edge discoveries in the world of medicine.  The HeLa cells are still alive today.  They were used without Henrietta's or her families' knowledge.  I have truly loved this book.  It would be a great book club selections.