In this instalment in the hilarious illustrated children's series, Rafe feels like a caged lion at his summer job at the zoo - until a real lion desperately needs his help.

Rafe is days away from sweet summer freedom - but his bad grades have other plans for him. He can't fail a summer job, right?

Working in a zoo sounds great but Rafe is stuck polishing his boss's car, digging oven pits and scrubbing . . . toilets.

He's destined for the failed jobs Hall of Fame until an encounter with an endangered lion puts his wildlife knowledge to the test.

This time, it's more than just his grades on the line.