You'll find the old official and third-party textbooks to borrow via Archive.org (list below). The UI and features are mostly similar, even in recent Poser versions. Though the latest Poser 12 and 13 will require some study to devise the best photoreal preset for your PC's configuration, and there have of course been many improvements and additional features (short video overviews of P11, P12 and P13 may help there). There's also always been the excellent manual that ships with Poser.

* Poser for Dummies: Creating your first, quality render.

* The Poser 5 handbook.

* Secrets of figure creation with Poser 5.

* Practical Poser 6.

* Character Animation with Poser Pro.

* Poser 7 Revealed : The e frontier official guide.

* The Art of Poser and Photoshop : The official guide.

* Practical Poser 8: The Official Guide.

* Figure Drawing with Virtual Models : Getting the most out of Poser.

* Secrets of Poser Experts : Tips, techniques, and insights for users.

Poser also still work with Vue. So Vue books may also interest.

* E-on Software's Vue 6 Revealed.

* Digital Sci-fi Art : a step-by-step guide to creating stunning, futuristic images.

---

Learn the Secrets of Poser 11 and Line-art Filters.