Wolf Brother by Michelle Paver

The book has a main character which can be empathised with by Upper KS2 children. Some of the concepts will need explaining for children who are unfamiliar with pre history facts.

Best thing about the writing within this book is that it stands as a good model of decriptive and evokative language for L5 writers.

There also is a great deal of resources on the web to support this text. Here for example is a very good teaching plan:

pearsonschoolsandcolleges.co.uk/Secondary/Literature/14-16/NewLongmanLiterature14-18/Resources/Supportmaterial/WolfBrother.pdf