TJF97,
#1 covers the practical flying i.e. all the manoevers etc you need to go through with the instructor so its not related specifically to a written paper
#2 covers both "Air Law and Operational Procedures" and "Meteorology" Exams
#3 Covers "Navigation and Radio Aids"
#4 covers the "Aircraft General and Principles of Flight"
#5 is the IMC one you dont need it for the basic PPL
#6 covers "Human Performance & Limitations"
#7 covers "Communications-PPL" for both the written Radiotelephoney exam and the oral one.
As far as I can remember i think that the "Flight Performance and Planning" exam is covered by the 3rd book.
I would also recommend getthing the PPL confuser as well I found it really useful
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