The idea of cryptohieroglyphs is accepted as true it seems (at least in France), even though most Egyptologist think they are highly interpretative: think about literature and how some literature expert would interpret Poe's books (sorry only classic US author i know beside Kerouac), except worse.
Still, it's clear ancient egyptians loved their puzzles, the clear interpretation of what they mean is what elude us.
Poe didn't really write books. He's most famous for poems and short stories. He wrote one novel ( The Narrative of Arthur Gordon Pym of Nantucket) and published a collection of poems.
Not that it matters. Just a bit of trivia. The only thing you need to know is that he's a gazillion times better than Kerouac, who did write books and shouldn't have.
Still, it's clear ancient egyptians loved their puzzles, the clear interpretation of what they mean is what elude us.