Being a life-long comic reader myself, one who discovered Marvel in the early 70's, I have my own winding history with their output. However, mine was even spotty - preferring Spider-Man and team titles like the Avengers, the Fantastic Four and the X-Men to others like Thor, Daredevil or Iron Man. Having a Marvel Unlimited subscription has helped me in recent years to correct that, allowing me to devour runs of titles I never picked up back in the day.
Wolk does a good job in this book giving an overview of certain issues to vist, also hitting some spotlights on specific favorite characters (as much as 320 pages will allow). There is a stronger focus on runs post-2000 as well as the early years from the 1960's. The 70's and 80's get some mention too, while the 90's - a very rough period for comics in general - gets a deserved glossing over.
One particular thing I really liked is the Appendix which gives a nice overview of the Marvel universe history in just a few pages. I would recommend highly for folks who might only know Marvel from the movies or TV shows to read that first.
This book is scheduled for an October release. I had already tagged it for my to-order list for the library. I think it contains some solid advice on tackling a deep dive into the Marvel continuity that will benefit my patrons.