Add. Books is /bʊks/, cats is /kæts/, booths is /bʉːθs/. If the ending is unvoiced, you voice the -s: legs is /lɛɡz/, birds is /bɜːdz., molds is /mɔuldz/.
English is quite tolerant of clusters. You’ll only get a segment dropping out when the cluster gets really complicated, and even then pedants will say that is not trying hard enough. sixths, months: /sɪksθs, manθs/, informally /sɪkːs, manːs ~ mants/.
Yes, I’m transcribing Australian English. Why do you ask?