This book is The Kids Of Einstein Elementary Titanic Cat - it didn't come up quite right with the ISBN - it just listed it as #2 in the series. But I wanted to add the full title here.
Kristi G. (romanshopper) reviewed Titanic Cat (Kids of Einstein Elementary, Bk 2) on + 46 more book reviews
My son loved it- simple & short, but with good math.
