I noticed that my usual login doesn't work either, so things might have changed slightly since the site was moved recently to a new hosting provider.
It should still be possible to navigate around the site tho, so I'm surprised to hear you're having those problems. Try these links, & let me know if you have any joy with them:
The other thread titles are all T2, but type 1 may well crop up inside other threads as a side-topic. You need a working search function to find them though, and the appropriate search parameter.
As for the book, I'll make some enquiries for you & let you know. I was T2 myself, and am now 'off-register' thanks to control via fasting.