Stories for Maths: KS1: Netty the Postmonster (Place value (within 20))

It's Netty's first day as a postmonster and she is very excited. Her friends decide to build a machine to help her deliver the letters, but it doesn't go to plan and Netty has to put things right. This book aligns with White Rose Maths for Year 1, Place value (within 20), Step 1. Count within 20.