Although you have to pass your theory test before you can take your practical test, it's recommended that you start studying for it, but don't sit the exam, until you have some practical experience of driving.
To prepare for the multiple choice part of the theory test, Learner2Driver strongly recommends that you study the books from which the questions are sourced as well as the questions themselves.
These books are The Manx Highway Code You can obtain a free copy by clicking the highlighted text:- The Manx Highway Code
This publication is essential reading for all drivers, even if you studied it when you took your car test. It's worth getting an up-to-date copy to ensure that you have the most recent advice on road safety and the laws which apply to all road users.
The Official Theory Test for Car Drivers and The Official Theory Test for Motorcyclists
These contain all the questions in the multiple choice part of the theory test, together with the answers and explanations. Available from Isle of Man Post Office, you should have received a free copy with your first provisional licence.
Know Your Traffic Signs
Download a copy here:- Traffic-Signs
This contains most of the signs and road markings that you are likely to come across.
Driving – The Essential Skills
This is the official reference, giving practical advice and best driving practice for all drivers. Available from good book sellers throughout the island.
These publications will help you to answer the questions correctly and will also help you when studying for your practical test. The information they contain will be relevant throughout your driving life so make sure you always have an up-to-date copy to which you can refer.