e-book can be a very excellent creation.it is in different sizes.it is something that can be read by some devices instead of texts printed in papers.with more and more people use it,e-book sells well ..
what makes it so popular?well,it's the advantages of e-book.first of all,e-book is totally differ from paper materia,it cannot be damaged easily.secondly,e-book is more environmental for it won't produce new substance and reduce the waste of paper.the larger capacity also make it more perfect.lastly,it is convenient to carry and do no harm to eyes even read under the sunlight.
Hope to be helpful to you