Bacteria and Viruses is for 7-11 year olds.  It is a big book for shared reading and contains explanatory text.  It belongs to The Human Body cluster.

Longman Book Project Fiction books excite all readers with an exceptional variety of major children’s authors and illustrators.

Series Editor: Sue Palmer
Non-fiction Editor: Bobbie Neate

Longman Book Project non-fiction for ages 4-11:

• Motivates a wide range of reading abilities with differentiated text in every book to support struggling readers and extend confident readers
• Encourages successful learning of information retrieval skills through clear and consistent page layouts and supportive photography
• Develops non-fiction reading and writing skills through National Curriculum and QCA linked cross-curricular subjects
• Provides guidance on monitoring progress and assessment for Key Stage 1 and 2 in the Teacher’s Books and Copymaster Books