My review is based on this specific edition.
This version of the book by MacMillan readers is meant for English language learners, so it is abridged and includes a note on the historical background, a character guide, illustrations, reading questions and a glossary separated by each book's thematic section (ex: first one is "light and darkness"). The thematic approach for the glossary serves two purposes: it helps identify Thiong'o's literary device for a higher-level read, and it helps encourage understanding of specific vocabulary at the highest/"upper" level of the readers series. A reader working in a class or independently can sense growth in literacy based on her/his understanding of these terms. Except for the illustrations, the set of extras are all useful additions; however, I felt that the abridged text did detract from the story. The reader sees moments of pain and conflict, courage and doubt--but often the action moves too quickly. I felt I did not know the characters well enough. Perhaps the extras could be paired with the original, unabridged text for use in schools.