This depends upon whether or not you have a specific problem with your spine or other orthopedic issues. Generally, however, the best reading position is sitting with your back supported from your head to the base of your spine. Reading pillows are ideal for this, particularly husband pillows or wedge pillows that are contoured to help support the natural curvature of your spine. Your feet should also be propped up, and any hard foam pillow or footrest should help with this. Some reading and gaming pillows come with wedges that can be used to support your legs or feet. Try to avoid your neck dropping towards your book.