For some mysterious reason this book is marketed as a biography. What it is in fact is a catalogue of every work the composer ever wrote, with maybe an explanatory line or two to put the piece in the context of what he might have been doing at the time. Sibelius the man remains merely a makeshift life-support system to the writer's main concern, the body of work.
Obviously there is a need to deal with more than just those concert fixtures: Finlandia, Valse Triste, Second & Fifth Symphonies. However, the dusty procession of works on every page lacks the detail and scholarship of a critical study, which this book is far closer to in spirit than a biography. Thus it falls between two stools; the writer would have been better advised to have yielded to temptation and gone for the critical study - yes, sales would have been fewer. But no, he wouldn't have written this disaster of a 'biography'.