The best book for MCQ preparation for GATE 2024 can vary depending on the subject you are preparing for and your individual learning style. However, here are some popular choices for GATE preparation:

A Handbook on Electrical Engineering by Made Easy publicationElectrical Engineering for GATE by R.K. Kanodia and Ashish MuroliaSolved Papers and Practice Sets for GATE EE by Arihant publicationObjective Electrical Technology by V.K. Mehta and Rohit MehtaGATE Tutor Electrical Engineering by Nem Chand Jain and B. Singh

It's important to note that while books can be a useful resource, they should not be the only source of preparation. It's also recommended to practice solving previous years' GATE papers and taking mock tests to build confidence and improve your test-taking skills.