I've had the pleasure of reading 'A Brief History of Time' by the late and great Stephen Hawking and 'Forces of Nature' by Brian Cox. More recently I've read 'Astrophysics for People in a Hurry' by Neil deGrasse Tyson. What I've noticed is the less difficult reads were also the more enjoyable. As someone who wouldn't be classed an avid reader I would like to see some suggestions that are less mathematical and more 'Black Holes are big, here is a pretty picture of a Black Hole (just don't get too close)'