The Syllabus 2019 edition of the RSGB Intermediate Licence Manual for Radio Amateurs is now available in the Amazon Kindle electronic format.
The book is for exams from September 2019 onwards & already has several corrections & updates.
https://rsgb.org/main/blog/publications/books-extra/2019/03/13/intermediate-licence-manual-for-radio-amateurs/
The kindle book is available via the following link for £6.99.
https://www.amazon.co.uk/dp/B07PQHWL9M/
Or you can buy the printed book version for £6.99 or £5.24 if you are a RSGB member from the following source.
https://rsgbshop.org/acatalog/Online_Catalogue_Training_19.html