Personal best - American English - C1 advanced - Student's book and workbook A:

 Personal Best is a 6-level general English course for today’s busy young adults who want to maximize their English language learning experience.

Developed with series editor Jim Scrivener, an internationally renowned teacher trainer and presenter, it brings together his focus on practice as a driver of improvement for students and a 21st-century course package with an integrated web-based video show and the Personal Best Language App.