Reddit reviews Biology of Aging

The book you mention, Handbook of the Biology of Aging is probably the best I've run across for what you are looking for. It is very much like review articles. They cover the major research up to publication date (in 2015), and dive into specifics going over experimental design and methodologies.

A simpler, shorter, and more accessible intro for those who don't have your credentials is Biology of Aging. But if you wanted a very general sweep that is still focused on those with a biology education to supplement the deeper dive, this would be a good choice. (For example the Handbook of the Biology of Aging focuses on animal and human aging whereas the Biology of Aging has a section on plant senescence as well).

Laura Deming also has a good Longevity FAQ that covers the aging research landscape but more importantly for your needs contains links to papers and clinical trials at the bottom.