E-books, as far as we know, weigh nothing and take up no space. Anyone who can make a case to the contrary is invited to comment.
Another huge advantage of e-books, at least in the case of the Distant Cousin stories, is that the price-to-entertainment ratio is super-attractive. Each one creates the type of mental movie that appeals to almost everyone. (Several could be double features.) Fast readers with time to spare could be lost for a week. Readers who are slower or have little spare time can look forward to weeks immersed in the unforgettable chronicles of Ana Darcy, the first alien to find her way back to Earth.
The best thing is that all seven Kindle editions cost about what the first one costs in paperback, the approximate cost of one movie theater ticket, a drink, and popcorn.
As one person told us (with a smile), "You know I love to read escapist trash. Yours is as good as the best of it. It's better than most of it!"