so ask someone! Would you like me to send it to you?
And yes, loil's way is faster, do that instead.
To answer the question about size, they're not big in hard disk space (a couple megabytes total), but they are big in quantity: imagine how many possible games can be played...well don't imagine, i have the number. The books go up to ply19. According to Appendix C of Victor Allis' thesis, there are 5,252,058,812 legal positions for 19 pieces on the board. Add that to the number of legal positions for ply18, ply17, etc. and the number is:
9,813,228,040 (if i typed it all right in my calculator).
But I think Allis counted most of the same positions twice, one position being on the left of the board, the other on the right. So the true number is Allis' number, A, minus the number of symmetrical positions, S (symmetrical positions can't get counted twice), divided by two, plus S. In other words: [(A-S)/2] + S
Since I don't know S, i'll estimate and say A/2, which is 4,906,614,020.
Oh it's actually not an estimate, the 2 in the denominator makes the two formulas equal somehow, as opposed to if it were say, 3. So there's your answer, 4.9 billion positions, which I doubt any of us have come close to playing yet in vianiato!
Technically there's a way to calculate how many positions your book files have, but i wont get into that now.