Turn page as in a book

As Math mentioned, the Mighty plugin (paid add-on; worth every penny) can help. It has a feature that allows you to upload a zip file containing custom html/scripts into a block, as well as many other nice ways to modify your content.

There are a few [older] libraries out there for acheiving a quite nice page turn effect for images or text content, used by many online store catalogues. The ones I've used in the past are https://github.com/VladIPlay/Turn.js-5  and http://www.turnjs.com .

You *could* in theory achieve the effect in Storyline but you might have to rely on custom javascript and leveraging the gsap library (greensock animation platform, https://gsap.com/) which is built in to the Storyline runtime; Storyline's built in animations aren't up to snuff for anything this complex.