These will be in PDF format...
I agree with you physical books are much more convenient (certainly for attributions/catalogues) but the volume of information here I wouldn't have room on my bookshelf for. At least it will give me the oppertunity to answer some questions for myself, and if the nature of any of these books is for general reading and education then I will be able to browse through them at my leisure and learn something. Besides you could not buy these books in hard form so cheaply...
I probably still need some substantial books to identify and catalogue both Roman and Greek coins, but since these books are as expensive as purchasing a decent coin I am putting that off. Having a small collection of already attributed coins I don't feel spending £100's on Encyclopedia's of Roman and Greeks would be worthwhile at present.