Bending/creasing your book’s spine is one way to easily hold your book open.
These book holders are also lightweight and very portable, making them easy to use and take with you anywhere.
Another possible method for holding a book open is to use page clips—either ones made specifically for holding books, or using items you already have around your house.
The weighted ends of this bookmark allow you to place it on your book and let it do the work of holding your book open for you.