Ega,
I use a Scansnap ix500 it does 50 pages at a time, top loading, looks like a printer but quite small. You can set for B&W or colour, single or double side at the same setting.
Last book I did was a very tatty Barber Coleman Gear Hobber book that I wanted to save before it got worse. It is 130 pages and it's 218,178Kb big but you can play with quality. I always leave it high quality as memory isn't expensive now.
Although it's advised you only load 50 pages you can add more as it gets down so you have a complete file and not have to append separate files.
Really it's only downside is that it has to be single sheet hence stripping books. I do have a book scanner where the spine hangs over the edge and it scans right to the edge but it's vey slow and all manual and TBH your mind goes into 'pudding' mode and you either miss a page or do a page twice. It really takes concentration.
That Barber Coleman book would have taken a good two hours on the book scanner and about 12 minutes on the Scansnap
Here's a good example, American but still the same.
https://www.youtube.com/watch?v=0okv5JfCGeI
Edited By John Stevenson on 25/11/2015 10:39:32