A massive, heavy, book, fascinating to look at more than to read, to see and study all the details that make the costumes work so well on camera, so much work and thought were put into them the results are great, for season 8 everything is a little too dark and grey, but every costumes are rich. Not all characters costumes are studied, would have loved more maesters or Maester Aemond robes, some characters are barely mentioned, it's okay. I'm impressed at all the details you barely notice while watching an episode but wouldn't they be there you would feel their misses, as a an irking something is off.
My favorites were Cersei's evolution loved the reinvented "dead" Lannister Lion.
A great book to look at to browse and study. Respect for their creators and their massive work.