It really depend on what you want out of it. If you want a translated copy of Aoi Hono I & II then buy them. They are mainly text with chibi yuzu's photos spread across the book. They are well done and standard book size. Yume wo ikiru more or less is the same as Aoi Hono I & II in term of structure. You get a couple photos of yuzu in hakama, which are lovely. Yuzuru photo book have older images of him until mid 2014ish. Ice Jewels Season Photos 2016-2017 is gorgeous Ice Jewels Pyeongchang 2018 is only 60 pages, though its gigantic. A little bigger than the Figure Skaters magazine
Personally I'd rec the Ice Jewel season photos 2016-2017, Ice Jewel Pyeongchang if you want gigantic photos of yuzu, His autobiographies Aoi Honoo I & II since there are translation for them, they're really nice books to read.