mmWave IC design is a big field! It is like asking, "I want to learn Physics. Recommend me books".
Start with passives. "Electromagnetics for High-Speed Analog and Digital Circuits" by Ali M. Niknejad covers the part on passives really well. You should also refer to the papers of John Long on transformers as well.. Understanding transformers is very crucial to understanding mmWave because they form the most important basic building block. Also, transmission lines.
Pick up "RF Microelectronics" by Behzad Razavi. Pick a chapter, for example, mixers. Understand (almost) everything in that book about mixers. And then look up papers on mixers at mmWave frequencies at IEEE. mmWave IC is RFIC at a higher carrier frequency. Those papers will give you a good idea about mmWave design techniques. But at the end of the day, you need to be able to simulate these things to get a feel. SpectreRF licenses are not sold individually. ADS licenses are also quiet expensive. Open Source tools are not great in mmWave simulations.
So, you are in trouble!