[General Introductions to] Keynes's General Theory

I want to build some catalog of readings which present some general or a bit technical introduction to J. M. Keynes's General Theory to help me and others to understand this not-easy-to-understand work of him. If you have good readings to suggest, please let me know. [cf. building a list of Keynes's writings]

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※ published books:

• [구글도서] A 'second edition' of The general theory (ed. G.C. Harcourt & P.A. Riach, 1997[2006])
• [구글도서] Understanding Keynes's General Theory (Brendan Sheehan, Palgrave Macmillan, 2009) ... 미리보기 없음
• A Guide to Keynes (Alvin H. Hansen, 1953): archive.org (Adobe Digital Editions reqired), Book2-PDF (Definitions and Ideas: 4~7), 
• [CF] Essays In The Theory Of Employment (Joan Robinson, 1947)

※ scholarly essays:

• The Evolution of J.M.Keynes's Wage and Employment Theory 1920-1946 (Alex J. Millmow, History of Economics, which year??)
• Lord Keynes and the General Theory (Paul A. Samuelson, 1946)
• Mr Keynes and the Moderns (Axel Leijonhufvud, 1997)
• Introduction to The General Theory (Paul Krugman, 2006): PDF, HTML(from Krugman's archive)
• Mr Keynes and the moderns (Paul Krugman, 2011): another PDF
• The relevance of Keynes (Robert Skidelsky, 2011)
• The History of Macroeconomics from Keynes’s General Theory to the Present (M. De Vroey and P. Malgrange, 2011)
• [CF] Contrasting Concepts of Capital: Yet Another Look at the Hayek-Keynes Debate (Steven Horwitz, 2011)
• [CF] Hayek’s Critique of The General Theory: A New View of the Debate between Hayek and Keynes (David Sanz Bas, Quarterly J. of Austrian Economics, Fall 2011)
• The Foundations of Keynes's Methodology: The General Theory (Lawrence A. Boland, which year?)
• A ‘SECOND EDITION’ OF KEYNES’S GENERAL THEORY (A.P. Thirlwall, 1998)

※ Guides, Essays, Study-notes on Chapter 3 and Book 2(Chapter 4~7)

• A Guide to Keynes(A.H. Hansen, 1953): Book2-PDF (Definitions and Ideas: 4~7)
• Aggregate Supply and Demand: An Explanation of Chapter III of the General Theory (Paul Wells, 1962)
• Trying to Make Sense of the Principle of Effective Demand (Jochen Hartwig, ??)
• Keynes, The General Theory: Chapter 6
• Summary chapter 6 (General Theory)

CF:

• Mr. Keynes and the "Classics": A Suggested Interpretation (J. R. Hicks, 1937): Jstor, some PDF, 
• Keynes's Theory of Employment (J. R. Hicks, 1936)
• Paul Krugman’s pathetic IS-LM obsession (Lars Pålsson Syll, 2012)
• Mr. Keynes and the "Classics" Again: An Alternative Interpretation (David Colander, which year?)
• Keynes, Ricardo, Malthus and Say's Law (Allin Cottrell, 1997)
• Keynes and Marx (Claudio Sardoni, ??)
• Liquidity-premium and the Theory of Value (Hugh Townshend, 1937)
• From Say’s law to Keynes, from Keynes to Walras’ law: some ironies in the history of economic thought (Antonio Carlos Macedo e Silva, ??)

CF. short columns:

• Keynes: The Return of the Master by Robert Skidelsky (a book review by Paul Krugman, 2009)