depends whether you want to learn chem and phys properly or hsc chem and phys.
i will assume hsc.
i think jac phys though I do think it leaves quite a bit to be desired but I doubt any other book is much better. all the hsc phys books probably arent that great
pearson chem is more logical than chem in focus imo, y11 i would say pearson, y12 you may need both books because both cover varying topics in different amounts/ways.
surfing is also decent as a 'grind' book for both subjects. pretty good actually.