'With the current revival of children's classics in the cinema, parents are rediscovering books they read when they were younger or are inspired to read them for the first time.'
The 'kid-ult' books were a perfect way for parents to bond with their children, he said.
'Just as both parents and children can enjoy the escapism and fantasy, these stories also raise important issues that they can talk about together.
'This sharing of ideas and opinions is critical to the emotional and creative development of children.
'It is important that parents continue to set aside the time to read with their children and encourage them to let their imaginations grow.'
Dr Sigman recommends the following 'kid-ult' books that parents could read with their children:
Alice In Wonderland and Alice Through The Looking Glass by Lewis Carroll
Artemis Fowl by Eoin Colfer
The Discworld Series by Terry Pratchett
The Amber Spyglass, The Subtle Knife and Northern Lights by Philip Pullman