The Aussie Angels Series
This is a series about twins Meg and Mike Green, who help their parents run 'Animal Haven', a wildlife shelter. They have a brother Mike who is a little devil, and a best friend called Boris Boola, who is also an honourary Angel.
With permanent residents Alice the labrador, Carol the camel, Oscar the owl and Wannabee the dog, as well as Cinnamon and Boss the koalas, Furbag the possum, Elsie the emu and Edna the echidna, the place is always busy. There are also injured or orphaned animals who need help. There are bird poachers, smugglers, shipwrecks, drug-dealers, disappearing planes and lots of mysteries for the Angels to solve. There are now 21 Aussie Angel books.