@liztai James Heisig has produced books for both traditional and simplified Hanzi. For example: https://www.amazon.com/Remembering-Simplified-Hanzi-Meaning-Characters/dp/0824833236/ref=sr_1_3?crid=ZPI2DFTTAXVF&keywords=heisig&qid=1704344515&sprefix=heisig%2Caps%2C278&sr=8-3 and https://www.amazon.com/Remembering-Traditional-Hanzi-Meaning-Characters-ebook/dp/B09WTSP8XK/ref=sr_1_6?crid=ZPI2DFTTAXVF&keywords=heisig&qid=1704344515&sprefix=heisig%2Caps%2C278&sr=8-6. The decks you download usually say "traditional" or "simplified" as both are available.