The "AIM" is an American publication, relating to the FAA PPL. This has no minimum hours but a mandatory 2- yearly checkride with an FAA CFI (instructor). The book is called FAR/AIM and comes out every year.
The roughly corresponding UK CAA publication is LASORS but this doesn't contain much of the basic law which the FAR/AIM contains. The law is the ANO. LASORS tends to contain rules which are within the power of the CAA to make as they wish e.g. the maximum number of big toes you can have...