New starter ?? What external books to help my online study would people recommend

Hi just started the course with distance learning and would wondering would people recommend any external books to purchase to help me going forward ask will most likely be doing level 3 and level 4 thereafter
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Any advice on this would be much appreciated.
in order you can also buy their work books and a wise guide (which is like a pocket guide i believe)- all really helpful and necessary, when you purchase their books you also get access to it in e-document format so you can print pages out too- hope this helps.