Chaos Phenomenology Hiroshi Serizawa ISBN 978-4489004223
A plain introduction to classical chaotic dynamics with sample programs. But, they are based on TurboC (!) and depend on Borland's Graphic Interface (BGI). Nowadays, a bit obsolete... :(
Prime Obsession -- Bernhard Riemann & the Greatest Unsolved Problem John Derbyshire ISBN 4-8222-8204-X
This books is a plain expository on Riemann Hypothesis. Actually, I didn't know well how good describing distribution of prime numbers the hypothesis and related theorems are.
I believe that you can do good mental gymnastics reading the book even if you don't have enough background knowledge on number theories. Actually, I didn't have almost at all. :o
Guin Saga 130 A Fathomless Future Kaoru Kurimoto ISBN 978-4-15-030975-6
This is the very last book of the Guin Saga series. It's a great pity that Kurimoto could not complete her greatest work. But, as her husband writes in postscript of the book, Kurimoto left us great amount of information about overall story line of the series. So, even I can imagine my own version of Guin Saga story, and now I'm wondering if my daughter would have interests on the series. If she does, it must be a happy time chatting various topics of the Guin Saga world with my daughter. :)