Instead of reading an eBook or listening an audiobook, you could do both at the same time. You might find that this helps you to remain focused. If the narrator is a good storyteller, the whole experience of reading becomes more immersive. Reading and listening simultaneously is even more beneficial when you read a book that’s not in your native language.
Whether it actually improves reading speed or comprehension is up to debate. A 2016 study found no significant differences in comprehension, whether a non-fiction book was presented via audiobook, electronic text or both simultaneously.