Books to help you with the theory test and learning to drive include:

Highway Code: RRP £4.99, free online version from GOV.UK
Know Your Traffic Signs: RRP £5.99, free downloadable PDF from GOV.UK
Driving The Essential Skills (car): RRP £19.99
The Official DVSA Theory Test for Car Drivers: RRP £19.99
Driver Active Free

All these books are available online at reduced prices from retailers like Amazon. Another place to by books and other driving essentials is DeskTopDriving

If you’re using apps for theory tests, use them as mock tests and supplement your learning with books.

For the Hazard perception test there are various, my preferred would be Driving Test Success or AA Theory Test
there are quite a few others available on App Stores and they range in prices.

*These are my personal recommendations