I purchased one of Piers Harpers board books 'Snow Bear', when my son was about a year old. We read it every night before bed. He had a lot of other books to choose from, but he always opted for his Piers Harpers book.
We now own quite a few and we cycle through them. Little Rabbit, Snow Bear, Little Owl, Little Lamb & Little Panda all went down well for us. The pictures in them are lovely watercolour pictures, with some parts having a raised effect. Soft to the touch material.
The vast majority of them are an ideal length for kids bedtime stories (about 22 pages). However, we have come across one "Playtime Snowbear" that had lovely pictures as always, but it was really way too short. There were very few words per page and a max of about 12 pages.
All the books have life messages in them, such as not straying too far away or similar issues. But they are delivered in a way to help young children understand without scaring them.
Can't say enough good things about them. We love them!