Partridge has always had great writers behind him but I’d have to agree that the Gibbons brothers have managed to pick up that legacy and expand on it, taking it in new, interesting directions while still being true to the character’s history.
In addition to This Time and MMM, consider the books, and particularly the audiobooks, of I, Partridge: We Need To Talk About Alan, and Nomad, both of which are comedy perfection. They know what they’re doing, likes.