Duplex and angular transactions, can you please explain and give examples?

I am eager to learn about transactional analysis. The only book I have found on the subject is by Eric Berne, which is decades old and very limited. Can you please tell me in your words about those various types of transactions e.g. ulterior transactions, simple transactions etc? If you have examples please share them with me too and also where can I find material about it online? Thanks.