Like anime soundtracks, these soundtracks and even sheet music books were usually marketed exclusively in Japan. Therefore, interested non-Japanese gamers had to import the soundtracks and/or sheet music books through on or offline firms specifically dedicated to video game soundtrack imports. This has been somewhat less of an issue more recently as domestic publishers of anime and video games have been producing western equivalent versions of the OSTs for sale in UK and US, though these are often for more popular titles. Video game music companies like Materia Collective have pursued and produced published book editions of video game music.