Hi,
Looks interesting… I may be preaching to the converted, as the saying goes, but for me the solar bible will always be Astrophysics of the Sun by Harold Zirin.
First printed in 1988 by CUP, re-printed 1989, it’s a bit dated but it is an excellent science foundation, graduate level but with much for the knowledgeable amateur. Only available second hand now and it seems to be sought after, some of the recent prices I’ve seen are very steep! However If you come across a decent copy at a reasonable price then I’d recommend buying it.
Cheers,
Bill.