A Huffpost article, 'The Case for Christian Gnosticism, Part IV: What Happens After We Die?' refers to the SPR's 1886 Phantasms of the Living, though not by name (actually 701 cases were analysed, not 700).
The article can be found here:
Phantasms of the Living hs been reprinted by Cambridge University Press:
https://www.cambridge.org/core/books/phantasms-of-the-living/9F0A0E709528D2C0EAC348FF83065921
It is also available in the SPR's online library, access to which is free to members (on the website under 'Our libraries').