Depends on the book. There are a lot of books that are the equivalent of a podcast episode (anything by Malcolm Gladwell) or a series of podcast episodes (anything by Robert Greene) and even some serious and influential books in the social sciences and can be cooked down to a single university lecture like
Exit, Voice and Loyalty by Albert O. Hirschman
Logic of Collective Action by Mancur Olson
The Zero-sum Society by Lester Thurow (want to know why the world gave up on tariffs?)
maybe some worthwhile management books could be extended into a podcast series, I'd say
Quality is Free by Phillip Crosby
Then there are some books that really could change your life, say
Solid State Physics by Ashcroft and Mermin
The Art of Computer Programming by Donald Knuth
Principles of Compiler Design by Aho and Ullman
Software Estimation: Demystifying the Black Art by Steve McConnell
The Mushroom Cultivator: A Practical Guide to Growing Mushrooms at Home by Paul Stamets
Starting Strength by Mark Rippetoe
Being and Event by Alain Badiou
Liberation in the Palm of your Hand by Pabongka Rinpoche
The Art of Happiness by Mirko Fryba
All of which have the element that they'll only change you if you engage deeply with them or the subject, like for the Rippetoe book you're going to have to pick up a bar.