A new book that has just come out is by a colleague and is highly recommended as a guide for parents:
Executive Functions at Home and School by Christina Young
This website is crucial in understanding the newest research on EF and the newest scales to measure it.
Brown, Peter C. (2014). Make it stick : The science of successful learning. Cambridge, Massachusetts:The Belknap Press of Harvard University Press.
Duckworth, A. (2016). Grit : The power of passion and perseverance. New York: Scribner.
Dweck, C. S. (2006). Mindset: The new psychology of success. New York: Random House.
Gallagher, R., Abikoff, H.B., and Spira, E.G. Organizational Skills Training for Children with ADHD. New York: Guilford Press 2014.
Solanto, M. Cognitive-Behavioral Therapy for Adult ADHD. New York: The Guilford Press 2011.