To be fair to your friend, eazybee, that edition does have pretty crappy binding - this is my copy! It has so-called ‘perfect binding’, which is anything but! The pages are stuck straight onto the spine of the cover with ‘flexible’ glue - but the glue doesn’t stay flexible as it ages, and single pages or chunks fall out. The only way to fix it is to re-glue, as your friend found out, Sellotape is worse than useless. In my first library job, we always used to give the perfect binding repairs to one particular member of staff who was really good at ‘tipping-in’ the loose pages - I never really got the hang of it!
NHS U turn on trans terminology