Beautifully bound and presented, but the print is small...
The pages have fairly small margins and the print and line spacing are more the size usually used in paperbacks than hardcovers.
That allows for both books to be packaged in a book whose thickness/size seems more like one relatively short novel.
HOWEVER.... aside from that one small quibble (which may partly reflect my own annoyance at nowadays needing to don eyeglasses to read small print, LOL!)... overall it's a GREAT book to introduce someone new to the fundamental works of Isaac Asimov!