Land of Roar. Jenny McLachlan. 2019.

When twins Arthur and Rose were little they were heroes in the Land of Roar, the imaginary world they created. Roar was filled with the things they loved - dragons, mermaids, ninja wizards and moonlight stallions - as well as the things that scared them most. 

 Now the twins are eleven, Roar is almost forgotten. But when strange things start happening, Arthur begins to wonder if maybe, just maybe…

Roar is real!