This textbook is aimed at all students studying N5 or Higher Psychology in one, year, and is also suitable for those who do both courses consecutively.
There is also a lot of good reading for those with a general interest in the area!
It came out in 2015 and is published by educational publisher Leckie and Leckie.
My Higher Psychology Success Guide is now out of print, as is 'Psychology for Higher' (by Staddon, Cherrie, Duffy, Firth and McDermott; Unity Publications, 2005). You may be able to obtain copies second hand.