A. Clutton-Brock & J. M. Robertson 
Shakespeare’s Hamlet bound with The Problem of Hamlet [PDF ebook] 

This volume combines two classic works on Hamlet, first published in 1919 and 1922. The first book’s original description says that it contains a theory which attempts to explain an everlasting problem – it insists that Hamlet is neither a failure not an accident, but a very great work of art. In a final chapter, the play is examined as an aesthetic document. It is a profoundly interesting and not unprovocative work. The second book reviews and attempts to resolve the most interesting debate of any Shakespeare play and presents proper method for investigating the genesis of the plays in this way.