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Are you Peter D. Riley, author of the books below?
Checkpoint Science 1 by Peter D. Riley Cambridge Checkpoint Science Student's Book 3 by Peter D. Riley Cambridge Checkpoint Science Student's Book 1 by Peter D. Riley 100 Science Lessons for Year 5 by Peter D. Riley Cambridge Checkpoint Science Student's Book 2 by Peter D. Riley Chemistry Now! 11-14 Teacher's Book by Peter D. Riley Checkpoint Chemistry Teacher's Book by Peter D. Riley The Human Body by Peter D. Riley Spark-electricity and How It Works by Peter D. Riley In the Rainforest by Peter D. Riley


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