(CNN) -- For years, all Hannah Pool knew was that her biological parents had died shortly after her birth.





An Eritrean-born girl adopted as an infant by a British academic, Pool found herself spending her first years in Norway before landing in the UK at the age of seven.





At times, she remembers, growing up in the northwest English city of Manchester as a Norwegian-speaking black girl with a white father was a source of confusion for people around her.





"When I was walking down the street holding my dad's hand, people would sometimes check that he wasn't sort of taking me, that he wasn't kidnapping me," says Pool, who today is a writer and journalist in the UK.





"There were lots of incidents like that which actually are just part of my upbringing, part of my DNA almost -- I'm used to having to explain myself, explain what I'm doing in the room, explain my relationship, whether it's with my dad or my brother or my sister," she adds.





But a few years later, Pool's already unconventional life took an even more astonishing twist.





Almost two decades after she left the Eritrean orphanage where she was adopted, Pool received a letter from the east African country informing her that her father was alive and well, living back home with her brothers and sister.





The news left the then 19-year-old Pool reeling.





"It was a complete shock," she recalls. "And it wasn't a creeping thing like 'maybe you have a cousin' or 'maybe you have an aunt' -- it was like BAM! 'you have a father,' BAM! 'here are your brothers and here's your sister,'" she says.





"My head went into a spin, I didn't know what to do or how I was supposed to respond to this -- was I supposed to get on a plane and go to Eritrea, was I supposed to go back to all the people who I told my story to and tell them 'actually that story is not right, this story is right' and the whole sense of the story of me was just pulled from beneath me like a rug."





Shocked by the revelation, Pool initially decided to ignore it and continue her university studies in Physiology.





But the thought she had a large family living in Eritrea was always with her "as a kind of an itch." So about 10 years later Pool felt that she had to get on a plane and travel to her birthplace.





Meeting her father and the rest of her family for the first time face-to-face was "incredibly emotional," says Pool. At the same time however, it was completely different to what she had expected.





"It was almost like an outer-body experience -- I watched myself go in the room, I was quite detached, I was surprised."





"The thing that hit me the most was the language and I hadn't prepared for that -- I had prepared for this beautiful reunion where everybody looked the same as me and we all kind of connect immediately.





"And it wasn't like that and the main barrier at the time was the language."





Pool quickly understood that her European upbringing was marking her as different in her birthplace, in a similar way that her Eritrean background was singling her out in the UK.





"I thought I'm going to feel at home with everyone and initially that's how I felt -- I stepped off the plane and thought 'wow, I'm at home, this is where I belong,' but I realized very quickly that actually I do stand out from everyone."





Since then, Pool has visited Eritrea three times. She describes her relationship with her family there as a "work in progress" and has started learning Tigrinya -- the local language -- in order to help her have a "normal family relationship."





A talented writer, Pool documented her journey to trace her family in a book entitled "
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