I don't know how useful this will be to anyone, but Google Books has the full view of Divine Plan of the Ages available. You may have to sign in to your Google account to view it.
Divine Plan of the Ages
by the_classicist 2 Replies latest watchtower bible
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Lady Lee
Studies in the Scriptures which the Plan comes from is all over the net for free.
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stev
There are various editions of the Studies in the Scriptures, originally Millennial Dawn. Google Books has the original edition to the Millennial Dawns, which are all rare. The 1886 edition of the Divine Plan is on Google Books. The other edition is the edition with the foreword of Russell's dated 1916, shortly before he died.