Your best bet is to buy an app as they’re not too bad anymore. I'd normally recommend checking out charity shops but you're out of luck on that one at the moment.
Most ATB's (Approved Training Body) have 'The Essential Skills' knocking around, so ask the school you have booked your training with, they might lend it to you - but it's very dry. It's the 'official ' guide.
'Learn to Ride' is not bad and a bit more informative.
'Learn to pass the test (and be a great rider too)' is a waste of money.
....I might have a copy of all of them... I'll have a look tomorrow