Kono Subarashii Sekai ni Shukufuku wo! (Konosuba in short) is a popular comedy Light Novel written by Akatsuki Natsume and drawn by Mishima Kurone. The Light Novel serie got an anime adaptation: 2 seasons and 1 movie.
Konosuba Cheers is an art book with 132 pages filled in with artwork from the main and spinoff Light Novel series. Most of the pages have coloured artwork, which is great because the colouring is really cheerfull and fun to look at. There's also some lewd ecchi drawings for the fans.
Overall Mishima Kurone's art is really great, especially the colouring. The retail price of 2800 yen (~25 dollars, ~23 euros) makes it a really must-buy art book for the fans of Konosuba or art lovers in general.