Books on Strategy Formulation

I am compiling a professional reading list of – and will be eventually sourcing for – books and resources, especially UK prints, on the subject of Strategy Formulation, as part of my own life-long research work into Opportunity Discovery and Strategic Exploration. I just want to make sure that I have not missed out any books or resources in this field. I welcome suggestions and ideas from members.
Say Keng Lee

I am compiling a professional reading list of - and will be eventually sourcing for - books and resources, especially UK prints, on the subject of Strategy Formulation, as part of my own life-long research work into Opportunity Discovery and Strategic Exploration. I just want to make sure that I have not missed out any books or resources in this field. I welcome suggestions and ideas from members.
Say Keng Lee