Ramin covers a wide swath of possibilities looking into why memory fails, and seeks solutions to each of the problem areas. It is very interesting reading. I felt at a loss at times in trying to follow the science. I was never much of a bio whiz. But it does appear that there are least understandable causes for much loss of mental capacity, and there might be ways to address most of those. Still, it might have been a nice thing to have had a chapter summarizing the gathered information, in tabular form with the causes on the left and the solutions, or at least ameliorative attempts on the right. As it is, I expect to be referring back to this book for some time, if I can remember where I put it.