Vocabulary consisting only from characters you are able to read
入門書
にゅうもんしょ
primer, manual, introductory bookmix
半魚人
はんぎょじん
(obsc) merman, half man-half fishmix
上る
のぼる
(1)to rise, to go up, to come up, to ascend, to be raised, (2)to enter (esp. from outdoors), to come in, to go in, (3)to enter (a school), to advance to the next grade, (4)to get out (of water), t godan, jlpt3, verb, vintrans
先ほど
さきほど
some time ago, not long ago, just nowmix