This should only interest international buyers, like me from Singapore (Asia), who buys from Amazon Europe.

Amazon Europe has revised their international shipping charges to reflect weight of the parcels.

Here's a comparison before and after for shipping charges to Asia.

Amazon Germany

Before
Standard: €14 (box)
Express: €40 (box)
There's no per-item charges

After
Standard: €9 (box) and €4 per kg
Express: €28 (box) and €8 per kg

Amazon France

Before
Standard: €13 (box) + €1.90 per item
Express: €19 (box) + €1.85 per item

After
Standard: €13 (box) + €1.90 per item
Express: €20 (box) + €4 per kg

Amazon Italy

Standard: €14 (box) + €5 per kg
Express: €25 (box) + €5 per kg

Amazon Spain

Standard: €14 (box) + €4 per kg
Express: €20 (box) and €9 per kg

What does this mean?

As books are heavy, this means it's now more expensive to ship them from Europe, with the exception of Amazon UK. Amazon UK's shipping rate still goes by per-item so it's relatively affordable.

It looks like I have to think twice before buying any books from Europe, especially if they aren't sold elsewhere.