First of all, I'd really recommend reading the tes website as there are loads of teachers there.
Each school has a different approach, although big books are fairly rare in ks2. This year (in year 3) we have been focussing on novels quite a bit; mainly Power of Reading texts. Sometimes we use shorter books (like Anthony Browne) or sometimes we follow ideas from the (now impossible to use) standards website.
I know my school does Varjak Paw in year 4, and we did Edward Tulane which was really good but possibly a bit much for year 3. A little girl dies of pneumonia :-/
I think textbooks are an unusual addition to schools nowadays. We had one Collins textbook in my year 4 class, but most of their scheme was based on the interactive whiteboard. I photocopied the pages on rare occasions, but normally only used it for ideas.
We follow the national strategy still for literacy topics- things like 3 weeks of narrative, 2 weeks of poetry, 3 weeks of information texts etc. depending on the head/ co-ordinator, you can mix things up as long as you meet the learning objectives. Have you got a chance to meet the other teachers in the school before september, and find out if they're using a scheme?
As for the day to day timetable, mine is usually guided reading, maths, playtime, literacy, topic or PSHE, lunch then topic. There are lot of good guided reading activities on the tes website- really worth looking at!