Sustainable energy - without the hot air by David MacKay A lot is written about energy efficiency and renewable energy, but do the sums add up?

There has been a recent spate of books in honour of Martin Gardner, who has spent over half of his 95 years entertaining us with his recreational mathematics.

The housekeeper and the professor by Yoko Ogawa, translated by Stephen Snyder A novel translated from the Japanese, where nothing much happens and prime numbers play a central role, may not sound like the most relaxing summer read.

Imagine a biologist trying to deduce the life cycle of an unknown creature by observing it just long enough to witness four beats of its heart. Nowadays, we know the Sun follows an eleven-year cycle, so even lifelong professional astronomers are likely to witness no more than four of its pulsations. Solar astronomy is truly a multigenerational science and its beginnings are brilliantly summarised in Stuart Clark's story, built around the greatest magnetic storm ever recorded.

If the quest for a physical theory of everything, and some of the strange concepts that have sprung from it, strikes you as somewhat mystical, then this is just the book you need to explore the idea further.

It's not very often that something I read makes me want to jack in my lovely job at Plus and return to study and research. But that is just what happened when reading Sync by Steven Strogatz.

When Number story first landed on my desk I was struck by its prettiness. With its tasteful and slightly old-fashioned cover design, the unusually compact format for a hardback, and the unassuming title, this book clearly isn't desperate for attention. So I was intrigued to find out whether this quiet confidence is justified by its content, and I'm glad to report that it is.

The Magic Numbers of the Professor revolves around a fictional professor and a huge range of magical numbers. Written in a narrative style, the book documents a series of visits the Professor makes from America to Ireland to visit Owen O'Shea, the author of both this book and a fictional column within the story.