My younger sister was drifting into left-radicalism.
She joined the military and was injured in training. She was confined to a bed for several weeks, and gave us the address at a military base so we could send her books.
I sent her "The Invisible Hook" (a book which uses pirates to teach economic ideas).
She doesn't seem to be a left-radical anymore. She also works for a living now, so I can't take complete credit, but I think the book really did make a difference.
My experience has been that communists are either not interested in reading "theory" or they read a ton of "theory". I don't yet know of a way to reach either group consistently, but the ones who read you might be able to get to read a book by Ludwig von Mises or some other economist. Per Bylund's new Primer and Hazlitt's Economics in One Lesson are great introductions to proper economics.
If the communist is only willing to address direct critiques (which IMO they should be more interested in but will probably find less persuasive than if they buit up a coherent view of economics), I would strongly recommend Mises' Economic Calculation in the Socialist Commonwealth and/or Bohm-Bawerk's Karl Marx and the Close of his System. Mises also gave a serious of lectures available now as "Marxism Unmasked: From Delusion to Destruction".
Free book links:
Mises:
Human Action (Mises' masterwork, and quite a hefty tome)
https://mises.org/library/book/human-action
https://mises.org/library/book/economic-calculation-socialist-commonwealth
https://mises.org/library/book/marxism-unmasked-delusion-destruction
https://mises.org/library/book/omnipotent-government-rise-total-state-and-total-war
https://mises.org/library/book/bureaucracy
I don't have a free link (outside of libgen) but I also recommend Mises' Liberalism in the classical tradition (if your daughter identifies as a liberal).
Bylund's Primer:
https://mises.org/library/book/how-think-about-economy-primer
Hazlitt's Economics in One Lesson:
https://www.liberalstudies.ca/wp-content/uploads/2014/11/Economics-in-One-Lesson_2.pdf
OK, but what is she refuses to read?
I think you just have to be patient and ask questions that inspire critical thinking. Where did all these factories come from? How do the factory people figure out what to make? How do they figure out whether to use steel or aluminum or titanium?
Some pop economics might be helpful here, such as Friedman's 2-minute video rendition of "I, Pencil"