About three months ago I completed a book review of the massive tome, The Mind of Charles Hartshorne for the American Journal of Theology & Philosophy. In order to complete the review (in particular of such a large book) I took copious notes, which incidentally filled two - yes two - small notebooks. I "rediscovered" Hartshorne the last year of my Ph.D. and upon completing my dissertation read every single book that Hartshorne wrote in addition to a good number of his articles.
In the below Randall Auxier reviews Dombrowski's excellent Divine Beauty: The Aesthetics of Charles Hartshorne. Even to this day I find Hartshorne's aesthetics extremely compelling.
See the review HERE.