Schooling through a move

Lessons have been a bit hit and miss at the moment as we are in the middle of a house move - that said there are a number of living books we have been reading that make me feel like we are still learning something : )

My favourite by far has been 'A Gebra named Al' where a young girl explores math land, learning along the way about science and math concepts like order of operations, atomic mass, isotopes, Bohr models etc.

My second favourite is in the Sir Cumference series from Charlesbridge Math 'Sir Cumference and the Off-The-Charts Dessert' were they had a giggle learning all about pie charts and bar graphs (and spent the rest of the afternoon baking).

What's your favourite math book?