This blog isn't about writing book reviews. As the name implies, it's RAW notes, i.e. unpolished, unfiltered, written-under-no-pressure. For book reviews, you might want to refer to the following instead:
<> Indiana University
<> St. Cloud State University
<> Queen's University Library
<> Dalhousie University Libraries
<> College of Staten Island Library
Incidentally - Difference between Book Reports and Book Reviews
Strange though - I can't seem to find any Singapore pages on how to write book reviews (in stark constrast to overseas libraries and academic institutions). I've just suggested to my colleagues that NLB ought to have something at the very least.