blogs / articles
I have been influenced and benefited greatly from Andrew Neitlich, the founder and director of Centre for Executive coaching. He trains senior level professionals to be leadership and executive coaches. He is an MBA from Harvard Business School and has authored many books on executive coaching.
His content has depth and impact and produces results. He provides practical tried and tested tools, interactive worksheets and even a comprehensive list of powerful questions for a multitude of organizational scenarios that provide a platform to take your coaching conversations to a different level.
I have benefited just by reading his free literature and blogs.
I would encourage you to google him and visit his web site if you are in this space. If you have found it useful, let me know.