I had a wonderful relationship with (most of) my grandparents. And, the relationship between child and grandparent can be a very special one indeed, with support going both ways.
The encyclopedia of Grannies by Éric Veillé & Daniel Hahn.
Quirky illustration and text makes this a riotous read.
Koro / Pops by Gavin Bishop.
A deceptively simple board book, which is available in both English and te reo Māori.
Maia and what matters to Tine Mortier, Kaatje Vermeire, & David Colmer.
The relationship between a grandchild and their grandmother, especially after the grandmother has a stroke, and their grandfather dies.
Tibble and Grandpa by Wendy Meddour & Daniel Egneus.
Tibble and Grandpa has a similar story to the above: a grieving grandparent, recovering from a stroke.