I actually follow this japanese lady's blog, so was delighted to see her recipe book published. Its set up in a slightly odd but very sensible way -- bento meals are basically 'takeaway' meals, eaten as school or work lunches, or for picnics or similar get-togethers, casual or very grand. (The western equivalent might be a scandinavian smorgsbord, lots of little goodies, beautifully arranged -- you can buy scandinavian versions of bento boxes, to hold your open sandwiches safely for transporting to school or work!)
She's organised things very sensibly, starting simply and breaking things down into the various bento components, then ringing changes from the basic to the fancy, all set out quite logically. There is a lot to take in, but this book is full of the 'how to', not just a collection of pretty photos. Also lots on where to get ingredients (including bento boxes!).
Its a nice way to eat, actually, even if your lunch isn't particularly 'japanese' -- its more about presenting your food in a varied and appetising way (which IS very japanese!).
I'd make only one complaint, that the typeface is a bit small and the designer was too interested in striking colour contrasts -- not always suitable if your eyesight is poor. (But worth the struggle I would say!)