My third book Dappa & Nappa and the New Cells in Town is available on iTunes. You can downloade it for free by using this link 
https://itunes.apple.com/us/book/dappa-nappa-and-the-new-cells-in-town/id1448262789?ls=1&mt=11
The
world’s smallest superheroes, Dappa and Nappa, are flying over Denmark
one sunny day in May. They decide to have a lunch break on the wing of
an airplane and, while they’re eating their sandwiches, they use their
super-hearing to listen to the passengers’ conversations. Suddenly, they
hear some tiny voices who are looking forward to coming to Copenhagen
in Denmark. They have a very exciting and important job to do.
When Dappa and Nappa look through the window to see who’s talking,
they’re surprised to find the voices are coming from a cooler.
Who’s in the cooler? And what kind of important job do they have in Copenhagen?
Age: 4-9 years.