With the exception of some newer fiction and our cookbooks we haven't organized our books since we moved a year and a half ago. But the majority of our books are in Bookpedia, so we should be able to have Bookpedia help us organize them. Step one is finding out how much space a book takes up. So I went around measuring the number of books contained in a foot of space on each shelf of several of our bookshelves. A quick foray into R:

> books_per_foot = c(14,11,17,11,10,18,12,12,
          13,16,15,14,13,14,15,8,10,10,11,11)
> summary(books_per_foot)
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
   8.00   11.00   12.50   12.75   14.25   18.00
> mean(books_per_foot)
[1] 12.75
> sd(books_per_foot)
[1] 2.613225

With that information (12.75 books per foot of shelf space with a standard deviation of 2.61 books) and the total length of each bookshelf, it ought to be relatively easy to extract a listing of what books to put on each bookshelf. Actually moving them will be more of a challenge!