An award-winning Brooklyn English teacher’s decision to provide each of his students with a copy of the Mary Shelley classic “Frankenstein” has thrust him into a real-life horror story.

Todd Friedman, a 29-year public-school veteran who teaches at Midwood High School, was put on administrative duty — and faces possible termination — after the city Department of Education slapped him with disciplinary charges.

His crime: He personally ordered 102 paperback copies of the novel from a publisher last September for his Advanced Placement students.

Friedman, 61, paid for the books out of his own pocket — about $220 with shipping — then sold them to students for $2 apiece to recoup most of the expenses.

But when Midwood Assistant Principal Suzanne Thomas heard about the transaction from students, she told Principal Michael McDonnell, who filed a formal complaint, records show.

In a March 21 report, the DOE’s Office of Special Investigations ruled that Friedman violated Chancellor’s Regulation A-610.

“Materials and textbooks supplied by the Department of Education for use in classes, shops or laboratories shall not under any circumstances be sold, nor shall any charge for them be made to the student,” the regulation says.

Friedman, a winner of the state Library Association’s Intellectual Freedom Award, was booted from his classes and reassigned to the administrative duty.

“I was providing a service to the students. This isn’t sexual abuse. This isn’t child molestation. I’m not a danger to the students,” Fridman said.

He noted that students spent $6 for “Hamlet” at the school bookstore, triple what he asked to recoup his layout for “Frankenstein.”

“Nobody had an issue with that,” Friedman said. “This has been going on for decades.”

A survey by the United Federation of Teachers found the average teacher spends about $500 out of pocket each school year.

Investigator with the Office of Special Investigations did not recommend any specific disciplinary action and instead referred their findings to the DOE’s administrative trials unit to determine Friedman’s punishment.

The investigators noted that Friedman didn’t profit off students and that the invoice, in fact, shows he sold the paperbacks “at a financial loss.”

Five students were interviewed as part of the probe, and none complained about paying the $2.

Friedman said the action by Midwood’s administrators was retaliation for his filing unfair-labor charges against the school in March of last year. He said he filed the charges to protest a new “dumbed down” curriculum and unfair evaluations.