Strata by Terry Pratchett

It's hard to surprise or shock a person when they've lived more than 200 years; they've really seen and heard it all. But Kin Arad is intrigued by the invisible man who appears suddenly in her office and his news of a flat planet's existence.

This was one of Pratchett's earliest books, and he's setting up the cosmology that his later Discworld books are built upon. It's captivating and imaginative. But also a challenge.

This book moves very quickly and presents some extremely foreign concepts: So much so, in fact, that I concurrently read a paper copy of the book (in the house) and listened to the audiobook (in the car). I have never used this dual approach before, and I found I really enjoyed it. With the audio I got characterization and pronunciation while the book allowed me to take a moment sometimes to reabsorb and wrap my head around a new and complex philosophy.

Oliver and the Seawigs by Philip Reeve and Sarah McIntyre

Young Oliver Crisp's explorer parents have decided to settle down in one place. But within minutes of arriving at their new house on Deepwater Bay, his parents row off to investigate islands which are not on their map. And then, they don't return.

So begins a deep-water adventure for chapter-book readers featuring wandering islands, mermaids, a talking albatross, and sarcastic seaweed. Fearlessly, Oliver sets off to find (save?) his parents, and the boy who's seen everything discovers some really interesting new sights while he's at it.

I loved this highly illustrated juvenile fantasy. It's full of fun characters and a quick-moving plot that's just a little different than everything else.