Lost and Safe is stylistically similar to previous Books albums, continuing the duo's rich use of samples.

[5] Throughout the album, these direct samples are juxtaposed with interpolated vocal passages performed by Books member Nick Zammuto.

[5] The Books opted to employ more linear song structures on Lost and Safe, with the intent of composing material more well suited to live performance.

[6] David Serra of AllMusic wrote: "From the songwriting to the production to the performance, the whole package that the Books present with Lost and Safe works wonderfully and makes for a very rewarding listen.

[15] All tracks are written by The Books (Paul de Jong and Nick Zammuto)Credits are adapted from the liner notes of the 2005 and 2011 issues of the album.