In my opinion, of the books I have so-far read on Mah Jong, there are two which I have found most helpful in considering one's strategy in the playing of Mah Jong.

A. D. Millington

Millington contributes a whole chapter (Ch.4) of his book "The Complete Mah-Jongg" to the matter of strategy. Entitled "Luck and Skill in Mah-Jongg" it examines the place of luck in the Chinese game, before turning to an analysis of how the player may think primarily offensively about his play, and perhaps later defensively.

While Millington is useful and interesting I do find the layout of the book off-putting. Typeset like a novel it makes it difficult to find things in a hurry.

Eleanor Noss Whitney

Whitney devotes Part Three of her book "A Mah Jong Handbook" to the matter of strategy. In the following 47 pages she splits the topic up into three sections: (1) Luck and Skill, (2) Offensive Strategy and (3) Defensive Strategy.

Whitney was the first author I read on Mah Jong strategy.