My perfect reading chair: the "Skye" model designed by Tord Bjorklund for Ikea in the 1970s. Its shape is essentially like an Adirondack chair connected to an ottoman, but padded and leather covered. Insanely comfy and perfect for reading.
Similar but more famous is the LC4 Chaise Longue designed by Le Corbusier.
Looks nice to lounge in but to read a book one needs arm rests, surely?