"When the Alden siblings visit their grandfather's friend in an apartment building, they begin to wonder about the many mysterious events that keep happening on the thirteenth floor of that building" OCLC.
year: 2019
call number/section: 1000
subjects: boxcar children (fictitious characters), juvenile fiction, brothers and sisters, apartment houses, superstition, detective and mystery stories, fiction, mystery and detective stories, detective and mystery fiction