As Pam Crabtree has noted in her review, this book should be a great addition to those dealing directly with someone with dementia.
I think this book can also be of value to those who are not directly dealing with a family member with dementia. I read some of the e-mails in real time (I'm a friend of one of the families). I do not have any family currently dealing with dementia, but in the years since this book began to be assembled I now have several friends with family members afflicted with some form of dementia, as well as family and friends that need help and attention on a daily basis. Reading through the book I was surprised to find how many of the experiences there touched directly on some of my developing tangential contacts with care giving. Dealing with hospice, getting patients to the doctor, dealing with bureaucracy and the like are not unique to dementia, even if those stresses and others can be so much worse in the long term care that dementia generally requires. The book has also opened a window on to some of the stresses and experiences of those friends I have, that, due to their dealing directly with a person suffering dementia, do not have as much current social contact outside their family as earlier.
Although not "literature" the book is well written/presented and read with an intensity that became physically palpable for me.
I highly recommend this for anyone with aging friends and relatives as well as those dealing more directly with the immediate issues of care giving. Even if you are blessed enough never to have to go through what the authors did I think you will find reading the book worthwhile for the insights into what so many others are going through.