'The Wild Robot' by Peter Brown
I absolutely loved this book!
It tells the story of Roz, a robot who wakes up (or rather, self-activates) on an island. She has no knowledge of how she got there, her purpose or origins. Slowly but surely, she adapts to her new environment and builds relationships with the multitudes of animals which inhabit it.
There are several themes which run through this deceptively simple book. They include: friendship, family, identity, loss, resilience different types of family and how we treat others.
The book contains some extremely poignant scenes so if you're a sensitive soul, I recommend reading it first so you're voice doesn't crack too much or your eyes become too dewy! The plot does touch on death several times, as well as adoption, so again, you really need to read it to see if it's right for your class, but personally I'd read this to Year 3 through 6.
The chapters are short and very action packed - it's not boring in the slightest. Extremely well-written, there are some gorgeous descriptions and examples of literary language, yet it's still accessible. Off the top of my head, I'd say it would be a great great stimulus for writing a diary entry. However, writing tasks aside, I think it would make a fantastic, stand-alone class read for pure enjoyment.
I can't recommend this book highly enough and I take my hat off to the author, Peter Brown. He has crafted an incredible piece of work. I've linked to the book's Amazon page below.
If you read it, let me know your thoughts (or writing ideas) in the comments section below.