Hi, I'm another one from Norn Iron I joined last week, paid £40 to join & for 6 weeks of classes so hopefully it'll help me to stick to it at least for the 6 weeks. I have an android phone so downloaded a free calculator which I use more than the one you buy at meetings as my phone is always with me. I heard that there are some differences in the points so books may not be accurate. I borrowed my mom's books & wrote down the things I'd have most, e.g. Indian takeaway, coffee out at the big coffee chains. This has saved me from buying books as I work everything out as I go along. Good luck with what ever you choose to do xo