Ambigram help please
I'm looking for ambigram design help. I would like to learn how to make them. Please help me to find resources, so I can practice. The simbi is in exchange for RESOURCES. (If you would like to send links to specific ambigrams you think are cool, that's great, but I will not be able to afford to trade simbi for every ambigram out there.)
An ambigram is a word that can be read from an alternate direction (usually upside down, but sometimes mirror image).
The cover of the book "Angels and Demons" by Dan Brown is one example: https://images.gr-assets.com/books/1328331755l/11204368.jpg
The 20th anniversary edition of The Princess Bride movie is another: https://images-na.ssl-images-amazon.com/images/I/81QSGfhyinL._SL1500_.jpg