If not, why not?

I don’t have time

The author probably spent a heck of a lot more time writing the story than you took to read it, no matter how slow you think you are, so why not take a few minutes to record your feelings about it.

I can’t write long fancy reviews like those I see on book review blogs

You don’t have to, Amazon, for example, only ask you to use a minimum of 25 non repeating words.

I can’t express myself very well

No-one is asking you to produce a literary masterpiece, start off with things you liked, didn’t like or a mix of both about the book, e.g.,

I liked this book because –

it reminded me of –

it made me think about –

it made me so scared I couldn’t sleep for –

it made me feel homesick for –

it made…