This is a really old book and I haven’t seen it in YEARS, but there was an excellent book I read as a kid called “The family nobody wanted.”.
It was a true story about a religious family (so no pritzus) who couldn’t have kids so they decided to adopt a kid. He then wanted a brother, so they adopted another kid. That kid wasn’t the same age as him, so they decided to adopt another kid… well read the rest of the book. Good old-fashioned values and good lessons and interesting reading, from what I recall.