The search term "hot" in this context is almost certainly a typo for "audio" (due to the proximity of 't' and 'u' on keyboards) or a misunderstanding of the audio quality. "Suomen Mestari 1" is a standard Finnish language textbook. There is no "hot" or adult version of the audio content.
The easiest way to access audio is through the app. suomen mestari 1 audio hot
If you are learning Finnish, you have almost certainly heard of Suomen Mestari 1 The search term "hot" in this context is
And you’ve found it. Here’s why this audio material is considered the "hot" ticket for mastering Finnish from scratch. suomen mestari 1 audio hot