For detailed information about west african music and especially highlife music I provide here some sources. In my blog I will focus on the visual aesthetics, most of the information I could give you about the music would only be second hand from a handful of websites, blogs and books.
So please look for yourself, it will be worthwile:
Florent Mazzoleni, Ghana Highlife Music, 2012
Sonny Oti, Highlife Music In Westafrica, 2009
John Collins, Music Makers Of West Africa, 1985
John Collins, Highlife Time, 1994
Wolfgang Bender, Der Nigerianische Highlife, 2006