Under normal circumstances, e-books needed to be purchased for a fee. The limited online reading of electronic versions violated copyright law. However, some websites will provide free e-books to read, but there may be advertisements, download restrictions, or other restrictions. If you want to restrict newcomers from reading e-books, I suggest you search and follow these websites and check their terms and conditions. At the same time, you can also consider buying physical books because physical books can be better preserved and read without advertisements and other distractions.