Well, if we consider books that make you think and have a high 'IQ' factor. 'Fahrenheit 451' by Ray Bradbury is a great choice. It makes you question society, knowledge, and the power of books. Also, '1984' by George Orwell is a classic that makes you reflect on politics, power, and individual freedom. These books are not directly from a named 'an iq novel series' but they fit the bill in terms of being intelligent reads.
I'm not sure exactly which 'an iq novel series books' you specifically mean. However, if it's about intelligent and mind - bending stories, 'A Brief History of Time' by Stephen Hawking, though not a traditional novel, has a narrative that challenges our understanding of the universe and could be related in a sense. And 'Gravity's Rainbow' by Thomas Pynchon is known for its complex and intellectually stimulating content.