The Episcopal/Anglican church CLAIMS to be Catholic -- i.e. to have Apostolic Succession and thus be part of the Catholic church -- just a branch or rite (like one of the Eastern Rites for example).
The author's point was that they are NOT Catholic and DON'T have Apostolic Succession . . . they claim to be Catholic but are actually a Protestant church, i.e. a reforming church that broke away and continues to differ substantially with Catholic theology.
Nothing derogatory about it - just that the Episcopalians CLAIM to be Catholic, but actually ARE protestant. IOW there's nothing wrong with the protestants in this regard -- but there's something very wrong with the Episcopalians and they are liars to boot.
"... and they are liars to boot."
Just the high church ones!
:)