Karen O’Brien is a comic book reviewer for CBR. She began reviewing comic books for Comics Buyer’s Guide magazine shortly after she became a book editor at Krause Publications. Books she authored for the publisher include Toys & Prices, O’Brien’s Collecting Toys, and O’Brien’s Collecting Toy Cars & Trucks among others. She eventually became a columnist for Comics Buyer’s Guide and wrote “The O’Brien Factor,” a monthly column that featured indie and mainstream comics reviews and creator interviews. After CBG ceased publication in 2012, she began writing for the indie-minded Broken Frontier site. In 2016, she joined the review team at Comic Book Resources and curbs her enthusiasm for Batman by reviewing other titles, too. Karen has been collecting comics since she was a kid and her mom let her select an issue of Superman from the magazine rack at the grocery store. She still has it.